Karoline Bragstad
Head of section
Contact
Send email {model.translations.sendEmailTo} Karoline.Bragstad@fhi.no
Department
Responsibilities
Influenza, SARS and MERS corona, RSV, Infectious disease surveillance and preparedness, Virology, Molecular biology, Evolution, Vaccine, Leadership
Projects and publications
- Even Fossum, Elisabeth Lea Vikse, Anna Hayman Robertson, Asia-Sophia Fumika Michaela Wolf, Andreas Rohringer, Lill Trogstad, Siri Mjaaland, Olav Hungnes, Karoline Bragstad, (2025). Low Levels of Neutralizing Antibodies Against SARS-CoV-2 KP.3.1.1 and XEC in Serum From Seniors in May 2024. Influenza and Other Respiratory Viruses doi: 10.1111/irv.70102
- Ignacio Garcia Llorente, Rasmus Kopperud Riis, Line Victoria Moen, Andreas Rohringer, Elisabeth Henie Madslien, Karoline Bragstad, (2025). Unsupervised detection of novel SARS-CoV-2 mutations and lineages in wastewater samples using long-read sequencing. BMC Genomics doi: 10.1186/s12864-025-11255-z
- Eeva K. Broberg, Maja Vukovikj, Olov Svartström, Iris Hasibra, Maximilian Riess, Angeliki Melidou, Sarah Denayer, François E. Dufrasne, Neli Korsun, Ivelina Trifonova, Goranka Petrović, Irena Tabain, Helena Jiřincová, Timotej Šúri, Amanda Bolt Botnen, Ramona Trebbien, Johanna Kristina Tamm, Regina Russanova, Niina Ikonen, Erika Lindh, Vincent Enouf, Laurence Josset, Marianne Wedde, Ralf Dürrwald, Georgia Gioula, Mary Emmanouil, Brynja Ármannsdóttir, Guðrún Erna Baldvinsdóttir, Simona Puzelli, Marzia Facchini, Svajune Muralyte, Monika Maconkaite-Tekoriene, Anke Wienecke-Baldacchino, Trung Nguyen, Graziella Zahra, Jackie Melillo, Adam Meijer, Ron Fouchier, Andreas Rohringer, Karoline Bragstad, Lidia B. Brydak, Ewelina Hallmann, Raquel Guiomar, Ana Paula Rodrigues, Mihaela Lazar, Rodica Popescu, Edita Staroňová, Elena Tichá, Vesna Šubelj, Katarina Prosenc, Francisco Pozo, Inmaculada Casas, Tove Samuelsson Hagey, Neus Latorre-Margalef, (2024). Antigenic changes in influenza A(H3N2) driven by genetic evolution: Insights from virological surveillance, EU/EEA, week 40/2023 to week 9/2024. Eurosurveillance doi: 10.2807/1560-7917.ES.2024.29.50.2400395
- Eeva K. Broberg, Olov Svartström, Maximilian Riess, Annette Kraus, Maja Vukovikj, Angeliki Melidou, Amanda Bolt Botnen, Ramona Trebbien, Niina Ikonen, Erika Lindh, Vincent Enouf, Laurence Josset, Ralf Dürrwald, Marianne Wedde, Maria Exindari, Elaine Brabazon, Charlene Bennett, Simona Puzelli, Marzia Facchini, Ron Fouchier, Adam Meijer, Andreas Rohringer, Karoline Bragstad, Raquel Guiomar, Ana Paula Rodrigues, Mihaela Lazar, Rodica Popescu, Katarina Prosenc, Nataša Berginc, Francisco Pozo, Inmaculada Casas, Tove Samuelsson-Hagey, Neus Latorre-Margalef, (2024). Co-circulation of seasonal influenza A(H1N1)pdm09, A(H3N2) and B/Victoria lineage viruses with further genetic diversification, EU/EEA, 2022/23 influenza season. Eurosurveillance doi: 10.2807/1560-7917.ES.2024.29.39.2400020
- Ignacio Garcia Llorente, Jon Bråte, Even Fossum, Andreas Rohringer, Line Victoria Moen, Olav Hungnes, Olav Fjære, Kyriako Zaragkoulias, Karoline Bragstad, (2024). Recombinant SARS-CoV-2 Delta/Omicron BA.5 emerging in an immunocompromised long-term infected COVID-19 patient. Scientific Reports doi: 10.1038/s41598-024-75241-3
- Mary A. Sinnathamby, Margaux M. I. Meslé, Piers Mook, Kirill Stolyarov, Silvia Bino, Iris Hasibra, Nune Bakunts, Romella Abovyan, Evgenia Khachtryan, Monika Redlberger-Fritz, Nazifa Mursalova, Firuza Aliyeva, Veronika Vysotskaya, Natallia Shmialiova, Inna Karaban, Nathalie Bossuyt, Cyril Barbezange, Sanja Musa, Nina Rodić Vukmir, Amela Dedeić Ljubović, Dijana Baštinac, Nadezhda Vladimirov, Neli Korsun, Ivelina Trifonova, Irena Tabain, Goranka Petrović, Christos Karagiannis, Christos Haralambous, Helena Jirincova, Jan Kyncl, Ramona Trebbien, Lasse Skafte Vestergaard, Olga Sadikova, Irina Eero, Eliisa Metsoja, Niina Ikonen, Outi Lyytikäinen, Hanna Nohynek, Lucie Fournier, Caroline Guerrisi, Martine Valette, Ani Machablishvili, Silke Buda, Brynja Armannsdottir, Guðrún Aspelund, Trine Hessevik Paulsen, Karoline Bragstad, Emma Appelqvist, AnnaSara Carnahan, Richard Pebody, (2024). Impact of the COVID-19 Pandemic on Influenza Circulation During the 2020/21 and 2021/22 Seasons, in Europe. Influenza and Other Respiratory Viruses doi: 10.1111/irv.13297
- Even Fossum, Andreas Rohringer, Torstein Aune, Kjersti Margrethe Rydland, Karoline Bragstad, Olav Hungnes, (2024). Antigenic drift and immunity gap explain reduction in protective responses against influenza A(H1N1)pdm09 and A(H3N2) viruses during the COVID-19 pandemic: a cross-sectional study of human sera collected in 2019, 2021, 2022, and 2023. Virology Journal doi: 10.1186/s12985-024-02326-w
- Håkon Bøås, Margrethe Larsdatter Storm, German Tapia, Anja Bråthen Kristoffersen, Astrid Louise Løvlie, Ketil Størdal, Trude Marie Lyngstad, Karoline Bragstad, Olav Hungnes, Lamprini Veneti, (2024). Frequency and risk of SARS-CoV-2 reinfections in Norway: a nation-wide study, February 2020 to January 2022. BMC Public Health doi: 10.1186/s12889-024-17695-8
- Ettore Amato, Susanne Hyllestad, Petter Heradstveit, Petter Langlete, Line Victoria Moen, Andreas Rohringer, Joao Pires, Jose Antonio Baz-Lomba, Karoline Bragstad, Siri Laura Feruglio, Preben Aavitsland, Elisabeth Henie Madslien, (2023). Evaluation of the pilot wastewater surveillance for SARS-CoV-2 in Norway, June 2022 – March 2023. BMC Public Health doi: 10.1186/s12889-023-16627-2
- Elisabeth Lea Vikse, Even Fossum, Magnhild Sekse Erdal, Olav Hungnes, Karoline Bragstad, (2023). Poor neutralizing antibody responses against SARS-CoV-2 Omicron BQ.1.1 and XBB in Norway in October 2022. Influenza and Other Respiratory Viruses s. 1-6. doi: 10.1111/irv.13144
- Lamprini Veneti, Jacob Dag Berild, Sara Sofie Viksmoen Watle, Jostein Starrfelt, Margrethe Greve-Isdahl, Petter Langlete, Håkon Bøås, Karoline Bragstad, Olav Hungnes, Hinta Meijerink, (2023). Effectiveness of BNT162b2 vaccine against SARS-CoV-2 Delta and Omicron infection in adolescents, Norway, August 2021 to January 2022. International Journal of Infectious Diseases s. 182-188. doi: 10.1016/j.ijid.2023.03.004
- Line Victoria Moen, Hilde Synnøve Vollan, Jon Bråte, Olav Hungnes, Karoline Bragstad, (2022). Molecular Epidemiology of the Norwegian SARS-CoV-2 Delta Lineage AY.63. Viruses s. 1-11. doi: 10.3390/v14122734
- Jeanette Stålcrantz, Anja Bråthen Kristoffersen, Håkon Bøås, Lamprini Veneti, Elina Marjukka Seppälä, Nina Therese Aasand, Olav Hungnes, Reidar Kvåle, Karoline Bragstad, Eirik Alnes Buanes, Robert Neil Whittaker, (2022). Milder disease trajectory among COVID-19 patients hospitalised with the SARS-CoV-2 Omicron variant compared with the Delta variant in Norway. Scandinavian Journal of Public Health s. 676-682. doi: 10.1177/14034948221108548
- Kirsten Midttun Gravningen, Stian Henriksen, Olav Hungnes, Kristian Svendsen, Emily Ann Macdonald, Henrik Schirmer, Kathrine Stene-Johansen, Gunnar Skov Simonsen, Oliver Kacelnik, Petter Elstrøm, Karoline Bragstad, Christine Hanssen Rinaldo, (2022). Risk factors, immune response and whole‐genome sequencing of SARS‐CoV‐2 in a cruise ship outbreak in Norway. International Journal of Infectious Diseases s. 10-20. doi: 10.1016/j.ijid.2022.02.025
- Lamprini Veneti, Håkon Bøås, Anja Bråthen Kristoffersen, Jeanette Stålcrantz, Karoline Bragstad, Olav Hungnes, Margrethe Larsdatter Storm, Nina Therese Aasand, Gunnar Øyvind Isaksson Rø, Jostein Starrfelt, Elina Marjukka Seppälä, Reidar Kvåle, Line Vold, Karin Nygård, Eirik Alnes Buanes, Robert Neil Whittaker, (2022). Reduced risk of hospitalisation among reported COVID-19 cases infected with the SARS-CoV-2 Omicron BA.1 variant compared with the Delta variant, Norway, December 2021 to January 2022. Eurosurveillance s. 1-8. doi: 10.2807/1560-7917.ES.2022.27.4.2200077
- Lin Cathrine T. Brandal, Emily Ann Macdonald, Lamprini Veneti, Tine Ravlo, Heidi Lange, Mohammed Umaer Naseer, Siri Laura Feruglio, Karoline Bragstad, Olav Hungnes, Liz Ertzeid Ødeskaug, Frode Hagen, Kristian E. Hanch-Hansen, Andreas Lind, Sara Sofie Viksmoen Watle, Arne Michael Taxt, Mia Karoline Johansen, Line Vold, Preben Aavitsland, Karin Maria Nygård, Elisabeth Henie Madslien, (2021). Outbreak caused by the SARS-CoV-2 Omicron variant in Norway, November to December 2021. Eurosurveillance doi: 10.2807/1560-7917.ES.2021.26.50.2101147
- Hanne-Dorthe Emborg, AnnaSara Carnahan, Karoline Bragstad, Ramona Trebbien, Mia Brytting, Olav Hungnes, Emma Byström, Lasse S. Vestergaard, (2021). Abrupt termination of the 2019/20 influenza season following preventive measures against COVID-19 in Denmark, Norway and Sweden. Eurosurveillance doi: 10.2807/1560-7917.ES.2021.26.22.2001160
- Brita Askeland Winje, Trine Skogset Ofitserova, Ola Brønstad Brynildsrud, Margrethe Greve-Isdahl, Karoline Bragstad, Rikard Rykkvin, Olav Hungnes, Hilde Marie Lund, Karin Maria Nygård, Hinta Meijerink, Lin Cathrine T. Brandal, (2021). Comprehensive Contact Tracing, Testing and Sequencing Show Limited Transmission of SARS‐CoV‐2 between Children in Schools in Norway, August 2020 to May 2021. Microorganisms s. 1-14. doi: 10.3390/microorganisms9122587
- Lamprini Veneti, Elina Marjukka Seppälä, Margrethe Larsdatter Storm, Beatriz Valcarcel Salamanca, Eirik Alnes Buanes, Nina Therese Aasand, Mohammed Umaer Naseer, Karoline Bragstad, Olav Hungnes, Håkon Bøås, Reidar Kvåle, Karan Samareh Golestani, Siri Laura Feruglio, Line Vold, Karin Maria Nygård, Robert Neil Whittaker, (2021). Increased risk of hospitalisation and intensive care admission associated with reported cases of SARS-CoV-2 variants B.1.1.7 and B.1.351 in Norway, December 2020-May 2021. PLOS ONE s. 1-12. doi: 10.1371/journal.pone.0258513
- Lamprini Veneti, Beatriz Valcarcel Salamanca, Elina Marjukka Seppälä, Jostein Starrfelt, Margrethe Larsdatter Storm, Karoline Bragstad, Olav Hungnes, Håkon Bøås, Reidar Kvåle, Line Vold, Karin Maria Nygård, Eirik Alnes Buanes, Robert Neil Whittaker, (2021). No difference in risk of hospitalization between reported cases of the SARS-CoV-2 Delta variant and Alpha variant in Norway. International Journal of Infectious Diseases s. 178-184. doi: 10.1016/j.ijid.2021.12.321
- Elina Marjukka Seppälä, Lamprini Veneti, Jostein Starrfelt, Anders Skyrud Danielsen, Karoline Bragstad, Olav Hungnes, Arne Michael Taxt, Sara Sofie Viksmoen Watle, Hinta Meijerink, (2021). Vaccine effectiveness against infection with the Delta (B.1.617.2) variant, Norway, April to August 2021. Eurosurveillance s. 1-6. doi: 10.2807/1560-7917.ES.2021.26.35.2100793
- Magnus Nygård Osnes, Kristian Alfsnes, Jon Bråte, Ignacio Garcia Llorente, Rasmus Kopperud Riis, Kamilla Heddeland Instefjord, Hilde Elshaug, Hilde Synnøve Vollan, Line Victoria Moen, Benedikte Nevjen Pedersen, Dominique Andree Yvette Caugant, Kathrine Stene-Johansen, Olav Hungnes, Karoline Bragstad, Ola Brønstad Brynildsrud, Vegard Eldholm, (2021). The impact of global lineage dynamics, border restrictions, and emergence of the B.1.1.7 lineage on the SARS-CoV-2 epidemic in Norway. Virus Evolution s. 1-7. doi: 10.1093/ve/veab086
- Elisabeth Toverud Landaas, Margrethe Larsdatter Storm, Mette Christophersen Tollånes, Regine Barlinn, Anne-Marte Bakken Kran, Karoline Bragstad, Andreas Christensen, Trude Andreassen, (2021). Diagnostic performance of a SARS-CoV-2 rapid antigen test in a large, Norwegian cohort. Journal of Clinical Virology s. 1-5. doi: 10.1016/j.jcv.2021.104789
- Arne Johan Norheim, Einar Kristian Borud, Andreas Lind, Elin Anita Fadum, Arne Michael Taxt, Anneke Steens, Karoline Bragstad, Erling Rein, Espen Rostrup Nakstad, (2021). Pre-screening and preventive quarantine likely explains the low SARS-CoV-2 prevalence among Norwegian conscripts. Scandinavian Journal of Primary Health Care s. 31-34. doi: 10.1080/02813432.2021.1880101
- Elina Marjukka Seppälä, Ragnhild Tønnessen, Lamprini Veneti, Trine Hessevik Paulsen, Anneke Steens, Robert Neil Whittaker, Karoline Bragstad, Jacob Dag Berild, Astrid Louise Løvlie, Mohammed Umaer Naseer, Emily Ann Macdonald, Line Vold, (2020). COVID-19 cases reported to the Norwegian Institute of Public Health in the first six weeks of the epidemic. Tidsskrift for Den norske legeforening (Tidsskriftet) doi: 10.4045/tidsskr.20.0525
- Lin Cathrine T. Brandal, Trine Skogset Ofitserova, Hinta Meijerink, Rikard Rykkvin, Hilde Marie Lund, Olav Hungnes, Margrethe Greve-Isdahl, Karoline Bragstad, Karin Maria Nygård, Brita Askeland Winje, (2020). Minimal transmission of SARS-CoV-2 from paediatric COVID-19 cases in primary schools, Norway, August to November 2020. Eurosurveillance doi: 10.2807/1560-7917.ES.2020.26.1.2002011
- Lars Ole Grottenberg, Ove Njå, Erlend Tøssebro, Geir Sverre Braut, Karoline Bragstad, Gry Marysol Grøneng, (2019). Detecting Influenza Outbreaks Based on Spatiotemporal Information from Urban Systems. Lecture Notes in Geoinformation and Cartography s. 87-106. doi: 10.1007/978-3-030-05330-7_4
- Karoline Bragstad, Olav Hungnes, Irene Litleskare, Hans Christian Nyrerød, DAGNY HAUG DORENBERG, Siri Helene Hauge, (2019). Community spread and late season increased incidence of oseltamivir‐resistant influenza A(H1N1) viruses in Norway 2016. Influenza and Other Respiratory Viruses s. 372-381. doi: 10.1111/irv.12637
- Natacha Alexandra da Fonseca Milhano, Kaja Sverdrup Borge, Karoline Bragstad, Susanne Gjeruldsen Dudman, (2018). Management strategies of enterovirus D68 outbreaks: current perspectives.. Virus Adaptation and Treatment s. 1-7. doi: 10.2147/VAAT.S140376
- Angeliki Melidou, Eeva Broberg, Monika Redlberger-Fritz, Therese Popow-Kraupp, Isabelle Thomas, Cyril Barbezange, Nathalie Bossuyt, Helena Jirincova, Alexander Nagy, Ramona Trebbien, Thea K. Fischer, Niina Ikonen, Anu Haveri, Outi Lyytikäinen, Satu Murtopuro, Sylvie Behillil, Vincent Enouf, Sylvie Van Der Werf, Alessandra Falchi, Martine Valette, Bruno Lina, Brunhilde Schweiger, Barbara Biere, Susanne Duwe, Marianne Wedde, Silke Buda, Andreas Mentis, Athanasios Kossyvakis, Vasiliki Pogka, Anna Papa-Konidari, Georgia Gioula, Maria Exindari, Linda Dunford, Jeff Connell, Grainne Tuite, Margaret Duffy, Joanne Moran, Bridget Hogg, Allison Waters, Cillian De Gas-Cun, Lisa Domegan, Joan O'Donnell, Michael Joyce, Maria Rita Castrucci, Simona Puzelli, Caterina Rizzo, Anto-Nino Bella, Francesco Maraglino, Dinagul Otorbaeva, Gulbarchyn Saparova, Natalija Zamjatina, Gatis Pakarna, Raina Nikiforova, Joël Mossong, Matthias Opp, Adam Meijer, Pieter Overduin, Marit De Lange, Anne Teirlinck, Guus Rim-Melzwaan, Ruud Van Beek, Marion Koopmans, Gé Donker, Olav Hungnes, Karoline Bragstad, Raquel Guiomar, Pedro Pechirra, Paula Cristóvão, Inês Costa, Patricia Conde, Ana Paula Rodrigues, Alina Elena Ivanciuc, Elena Burtseva, Elena Kirillova, Evgeniya Mukasheva, Elena Tichá, Katarina Prosenc, Nataša Berginc, Francisco Pozo, Inmaculada Casas, Amparo Larrauri, Jesús Oliva, Concha Delgado, Raúl Ortiz De Lejarazu Leonardo, Mia Brytting, Åsa Wiman, Samuel Cordey, Ana Rita Goncalves, Damir Perisa, Rita Born, Joanna Ellis, Monica Galiano, Catherine Thompson, Maria Zambon, Richard Pebody, Rory Gunson, Arlene Reynolds, Jim McMenamin, Conall McCaughey, Cathriona Kearns, (2017). Predominance of influenza A(H3N2) virus genetic subclade 3C.2a1 during an early 2016/17 influenza season in Europe - Contribution of surveillance data from World Health Organization (WHO) European Region to the WHO vaccine composition consultation for northern hemisphere 2017/18. Vaccine s. 4828-4835. doi: 10.1016/j.vaccine.2017.07.057
- Siri Kulberg Sjurseth, Britt Gjerset, Karoline Bragstad, Olav Hungnes, Helene Wisløff, Chiek Er, Mette Valheim, Siri Løtvedt, Bruce David, Skjalg Hanssen, Siri Helene Hauge, Merete Hofshagen, (2017). Human to animal transmission of influenza A(H1N1)pdm09 in a turkey breeder flock in Norway. Infection Ecology & Epidemiology doi: 10.1080/20008686.2017.1416249
- Maiken Worsøe Rosenstierne, Helen Karlberg, Karoline Bragstad, Gunnel Lindegren, Malin Lundahl Stoltz, Cristiano Salata, Anne-Marte Bakken Kran, Susanne Gjeruldsen Dudman, Ali Mirazimi, Anders Fomsgaard, (2016). Rapid bedside inactivation of Ebola virus for safe nucleic acid tests. Journal of Clinical Microbiology s. 2521-2529. doi: 10.1128/JCM.00346-16
- Eeva Broberg, Angeliki Melidou, Katarina Prosenc, Karoline Bragstad, Olav Hungnes, (2016). Predominance of influenza A(H1N1)pdm09 virus genetic subclade 6B.1 and influenza B/Victoria lineage viruses at the start of the 2015/16 influenza season in Europe. Eurosurveillance doi: 10.2807/1560-7917.ES.2016.21.13.30184
- Randy Poelman, Isabelle Schuffenecker, Coretta Van Leer-Buter, Laurence Josset, Hubert G.M. Niesters, Bruno Lina, Anne-Marte Bakken Kran, Karoline Bragstad, Susanne Gjeruldsen Dudman, Andreas Christensen, Sidsel Krokstad, (2015). European surveillance for enterovirus D68 during the emerging North-American outbreak in 2014. Journal of Clinical Virology s. 1-9. doi: 10.1016/j.jcv.2015.07.296
- Helle Cecilie Pfeiffer, Karoline Bragstad, Marius Kurås Skram, Hilde Margrete Dahl, Per Kristian Knudsen, Maninder Singh Chawla, Mona Holberg-Petersen, Kirsti Vainio, Susanne Gjeruldsen Dudman, Anne-Marte Bakken Kran, Astrid Rojahn, (2015). Two cases of acute severe flaccid myelitis associated with enterovirus D68 infection in children, Norway, autumn 2014. Eurosurveillance doi: 10.2807/1560-7917.ES2015.20.10.21062
- Karoline Bragstad, Kirsti Jakobsen, Astrid Rojahn, Marius Kurås Skram, Kirsti Vainio, Mona Holberg-Petersen, Olav Hungnes, Susanne Gjeruldsen Dudman, Anne-Marte Bakken Kran, (2015). High frequency of enterovirus D68 in children hospitalised with respiratory illness in Norway, autumn 2014. Influenza and Other Respiratory Viruses s. 59-63. doi: 10.1111/irv.12300
- Rebecca Jane Cox, Arnt-Ove Hovden, Karoline Bragstad, Inger Marie Haaland, Lars Reinhardt Haaheim, (2004). Comparison of the humoral immune response to split and whole virus vaccines in mice. s. 632-635.
- Olav Hungnes, Trine Hessevik Paulsen, Andreas Rohringer, Elina Marjukka Seppälä, Håkon Bøås, Jesper Dahl, Even Fossum, Jeanette Stålcrantz, Birgitte Klüwer, Kjersti Margrethe Rydland, Torstein Aune, Karoline Bragstad, (2025). Interim Influenza Virological and Epidemiological season report prepared for the WHO Consultation on the Composition of Influenza Virus Vaccines for the Northern Hemisphere 2025/2026.
- Anne-Marte Bakken Kran, Othilde Elise Håvelsrud, Margrethe Larsdatter Storm, Hege Salvesen Blix, Andreas Rohringer, Karoline Bragstad, Kathrine Stene-Johansen, Rikard Rykkvin, Grete Anette Birkeland Kro, Kristina Nystrøm, Vidar Ormaasen, Gro Njølstad, Monica Regine Romstad, Hans-Johnny Schjelderup Nilsen, Garth Daryl Tylden, (2024). Usage of Antivirals and the Occurrence of Antiviral Resistance in Norway 2023. RAVN .
- Olav Hungnes, Trine Hessevik Paulsen, Andreas Rohringer, Elina Marjukka Seppälä, Håkon Bøås, Even Fossum, Jeanette Stålcrantz, Birgitte Klüwer, Kjersti Margrethe Rydland, Torstein Aune, Karoline Bragstad, (2024). Influenza Virological and Epidemiological 2023-24 season report, October 2024.
- Olav Hungnes, Trine Hessevik Paulsen, Andreas Rohringer, Elina Marjukka Seppälä, Håkon Bøås, Even Fossum, Jeanette Stålcrantz, Birgitte Klüwer, Kjersti Margrethe Rydland, Torstein Aune, Karoline Bragstad, (2024). Influenza Virological and Epidemiological season report prepared for the WHO Consultation on the Composition of Influenza Virus Vaccines for the Southern Hemisphere 2025.
- Olav Hungnes, Trine Hessevik Paulsen, Andreas Rohringer, Elina Marjukka Seppälä, Håkon Bøås, Jesper Dahl, Even Fossum, Jeanette Stålcrantz, Birgitte Klüwer, Kjersti Margrethe Rydland, Torstein Aune, Karoline Bragstad, (2024). Interim influenza Virological and Epidemiological season report prepared for the WHO Consultation on the Composition of Influenza Virus Vaccines for the Northern Hemisphere 2024/2025.
- Olav Hungnes, Trine Hessevik Paulsen, Andreas Rohringer, Elina Marjukka Seppälä, Håkon Bøås, Jesper Dahl, Even Fossum, Jeanette Stålcrantz, Birgitte Klüwer, Kjersti Margrethe Rydland, Torstein Aune, Karoline Bragstad, (2023). Influenza Virological and Epidemiological season report prepared for the WHO Consultation on the Composition of Influenza Virus Vaccines for the Southern Hemisphere 2024, October 2023.
- Olav Hungnes, Trine Hessevik Paulsen, Andreas Rohringer, Elina Marjukka Seppälä, Håkon Bøås, Jesper Dahl, Even Fossum, Jeanette Stålcrantz, Birgitte Klüwer, Kjersti Margrethe Rydland, Torstein Aune, Karoline Bragstad, (2023). Influenza Virological and Epidemiological season report, October 2023.
- Anne-Marte Bakken Kran, Othilde Elise Håvelsrud, Margrethe Larsdatter Storm, Hege Salvesen Blix, Karoline Bragstad, Kathrine Stene-Johansen, Andreas Rohringer, Garth Daryl Tylden, Grete Birkeland Kro, Rikard Rykkvin, Vidar Ormaasen, Åshild Marvik, Gro Njølstad, Hans-Johnny Schjelderup Nilsen, Dag Henrik Reikvam, (2023). Usage of Antivirals and the Occurrence of Antiviral Resistance in Norway 2022. RAVN.
- Olav Hungnes, Trine Hessevik Paulsen, Andreas Rohringer, Elina Marjukka Seppälä, Ragnhild Tønnessen, Håkon Bøås, Jesper Dahl, Even Fossum, Jeanette Stålcrantz, Birgitte Klüwer, Kjersti Margrethe Rydland, Torstein Aune, Karoline Bragstad, (2023). Interim Influenza Virological and Epidemiological season report prepared for the WHO Consultation on the Composition of Influenza Virus Vaccines for the Northern Hemisphere 2023/2024.
- Karoline Bragstad, Trine Hessevik Paulsen, Elina Marjukka Seppälä, Ragnhild Tønnessen, Birgitte Klüwer, Kjersti Margrethe Rydland, Line Victoria Moen, Andreas Rohringer, Torstein Aune, Olav Hungnes, (2022). Influenza Virological and Epidemiological season report, October 2022 .
- Anne-Marte Bakken Kran, Margrethe Larsdatter Storm, Othilde Elise Håvelsrud, Irene Litleskare, Karoline Bragstad, Kathrine Stene-Johansen, Grete Anette Birkeland Kro, Rikard Rykkvin, Vidar Ormaasen, Dag Henrik Reikvam, Karsten Midtvedt, Håvard Midgard, Kristian Nødtvedt Malme, Anne Olaug Olsen, (2022). Usage of Antivirals and the Occurrence of Antiviral Resistance in Norway 2021. RAVN .
- Karoline Bragstad, Trine Hessevik Paulsen, Ragnhild Tønnessen, Birgitte Klüwer, Kjersti Margrethe Rydland, Torstein Aune, Olav Hungnes, (2021). Influensasesongen i Norge 2020-2021 - årsrapport.
- Karoline Bragstad, Trine Hessevik Paulsen, Ragnhild Tønnessen, Birgitte Klüwer, Kjersti Margrethe Rydland, Torstein Aune, Olav Hungnes, (2021). Influenza Virological and Epidemiological season report prepared for the WHO Consultation on the Composition of Influenza Virus Vaccines for the Southern Hemisphere 2022 .
- Anne-Marte Bakken Kran, Irene Litleskare, Karoline Bragstad, Kathrine Stene-Johansen, Grete Anette Birkeland Kro, Margrethe Larsdatter Storm, Andreas Christensen, Vidar Ormaasen, Garth Daryl Tylden, (2021). Usage of Antivirals and the Occurrence of Antiviral Resistance in Norway 2020. RAVN.
- Anne-Marte Bakken Kran, Irene Litleskare, Karoline Bragstad, Kathrine Stene-Johansen, Grete Anette Birkeland Kro, Rikard Rykkvin, (2020). Usage of Antivirals and the Occurrence of Antiviral Resistance in Norway 2019. RAVN .
- Karoline Bragstad, Trine Hessevik Paulsen, Ragnhild Tønnessen, Birgitte Klüwer, Kjersti Margrethe Rydland, Olav Hungnes, (2020). Norway National Influenza Centre: Influenza Virological and Epidemiological Information prepared for the WHO Consultation on the Composition of Influenza Virus Vaccines for the Northern Hemisphere 2019–2020 Geneva, February 2020.
- Karoline Bragstad, Olav Hungnes, Trine Hessevik Paulsen, Ragnhild Tønnessen, Kjersti Margrethe Rydland, Birgitte Klüwer, Torstein Aune, Siri Helene Hauge, (2020). Influensasesongen i Norge 2019-2020.
- Siri Helene Hauge, Hinta Meijerink, Benedikte Louise Alveberg, Are Stuwitz Berg, Anne Bergh, Karoline Bragstad, Birgitte Freiesleben De Blasio, Hanne-Merete Eriksen-Volle, Siri Laura Feruglio, Frode Forland, Gry Marysol Grøneng, Jørn Andreas Holme, Olav Hungnes, Bjørn Gunnar Iversen, Julie Denise Whittle Johansen, Knut Jønsrud, Emily Ann Macdonald, Karin Maria Nygård, Hanne Magdalene Nøkleby, Trine Hessevik Paulsen, Christina Lill Rolfheim-Bye, Kjersti Margrethe Rydland, Ragnhild Tønnessen, Kjetil Berg Veire, Line Vold, Richard Aubrey White, Torbjørn Wisløff, Britt Wolden, (2020). Urbanization and preparedness for outbreaks with high-impact respiratory pathogens.
- Karoline Bragstad, Kristian Waalen, Trine Hessevik Paulsen, Ragnhild Tønnessen, Torstein Aune, Birgitte Klüwer, Kjersti Margrethe Rydland, Olav Hungnes, (2019). Norway National Influenza Centre: Influenza Virological and Epidemiological Information prepared for the WHO Consultation on the Composition of Influenza Virus Vaccines for the Northern Hemisphere 2019–2020 Beijing, February 2019.
- Karoline Bragstad, Kristian Waalen, Trine Hessevik Paulsen, Torstein Aune, Birgitte Klüwer, Kjersti Margrethe Rydland, Olav Hungnes, (2019). Early risk assessment: What to expect of the 2018/19 influenza season in Norway.
- Karoline Bragstad, Olav Hungnes, Trine Hessevik Paulsen, Ragnhild Tønnessen, Torstein Aune, Kristian Waalen, Kjersti Margrethe Rydland, Birgitte Klüwer, Siri Helene Hauge, (2019). Influensasesongen i Norge 2018-19..
- Karoline Bragstad, Trine Hessevik Paulsen, Ragnhild Tønnessen, Birgitte Klüwer, Kjersti Margrethe Rydland, (2019). Norway National Influenza Centre: Influenza Virological and Epidemiological Information prepared for the WHO Consultation on the Composition of Influenza Virus Vaccines for the Southern Hemisphere 2020. 2020 Geneva, September 2019 .
- Irene Litleskare, Karoline Bragstad, Anne-Marte Bakken Kran, Othilde Elise Håvelsrud, Vidar Ormåsen, Kathrine Stene-Johansen, Grete Anette Birkeland Kro, Rikard Rykkvin, (2019). Usage of Antivirals and the Occurrence of Antiviral Resistance in Norway 2018. RAVN.
- Irene Litleskare, Karoline Bragstad, Anne-Marte Bakken Kran, Anita Kanestrøm, Kathrine Stene-Johansen, Grete Birkeland Kro, Bente Magny Bergersen, Olav Dalgard, Birgitta Åsjö, Karianne Johansen, (2018). Usage of Antivirals and the Occurrence of Antiviral Resistance in Norway 2017.
- Karoline Bragstad, Olav Hungnes, Kristian Waalen, Torstein Aune, Ragnhild Tønnessen, Kjersti Margrethe Rydland, Birgitte Klüwer, Siri Helene Hauge, (2018). Influensasesongen i Norge 2017-18. Årsrapport.
- Karoline Bragstad, Kristian Waalen, Ragnhild Tønnessen, Trine Hessevik Paulsen, Torstein Aune, DAGNY HAUG DORENBERG, Remilyn Vicenta R. Ramos-Ocao, Siri Helene Hauge, Olav Hungnes, (2018). Norway: National Influenza Centre – Influenza Epidemiological Information prepared for the WHO Informal Meeting on Strain Composition for Inactivated Influenza Vaccines for use in the Season 2019. Atlanta, September 2018.
- Olav Hungnes, Siri Helene Hauge, Kjersti Margrethe Rydland, Kristian Waalen, Anna Hayman Robertson, Ragnhild Tønnessen, Karoline Bragstad, Karine Nordstrand, Marianne Morken, Anne Maria Lund, Marie Paulsen Madsen, Remilyn Vicenta R. Ramos-Ocao, Valentina Morales Johansen, Torstein Aune, Gry Marysol Grøneng, Kirsten Konsmo, Tora Alexandra Ziesler Scharffenberg, Susanne Gjeruldsen Dudman, DAGNY HAUG DORENBERG, (2016). Influensasesongen i Norge 2015-16. Årsrapport.
- Anita Kanestrøm, Irene Litleskare, Karoline Bragstad, Susanne Gjeruldsen Dudman, Bente Magny Bergersen, Anne-Marte Bakken Kran, John Pettersson, Kathrine Stene-Johansen, Halvor Rollag, Johan Lennerstrand, (2016). Usage of Antivirals and the Occurrence of Antiviral Resistance. RAVN in Norway 2015.
- Inger Sofie Samdal Vik, Susan G. Dudman, Irene Litleskare, Olav Hungnes, Karoline Bragstad, Anne-Marte Bakken Kran, Birgitta Åsjø, Kathrine Stene-Johansen, (2015). Usage of Antivirals and the Occurrence of Antiviral Resistance in Norway 2013–2014. RAVN 2013-2014.
- Olav Hungnes, Siri Helene Hauge, Fredrik Oftung, Kjersti Margrethe Rydland, Karin Rønning, Susanne Gjeruldsen Dudman, Kristian Waalen, Ellen Furuseth, Lill Trogstad, Marianne A Riise Bergsaker, Birgitte Klüwer, Siri Mjaaland, Harald Pors Muniz, Siri Eldevik Håberg, Birgitte Freiesleben De Blasio, Elmira Flem, Anna Hayman Robertson, Ragnhild Tønnesen, Karoline Bragstad, Karine Nordstrand, Gry Marysol Grøneng, (2015). Influensasesongen i Norge 2014-15. Årsrapport sykdomsprogram for influensa .
- Siri Helene Hauge, Olav Hungnes, Kjersti Margrethe Rydland, Ragnhild Tønnessen, Fredrik Oftung, Siri Mjaaland, Lill Trogstad, Siri Eldevik Håberg, Kristian Waalen, Karoline Bragstad, Birgitte Freiesleben De Blasio, Anna Hayman Robertson, (2014). Influensasesongen i Norge 2013–14: årsrapport.
- Even Fossum, Andreas Rohringer, Torstein Aune, Kjersti Margrethe Rydland, Karoline Bragstad, Olav Hungnes, (2024). Correction to: Antigenic drift and immunity gap explain reduction in protective responses against influenza A(H1N1)pdm09 and A(H3N2) viruses during the COVID-19 pandemic: a cross-sectional study of human sera collected in 2019, 2021, 2022, and 2023 (Virology Journal, (2024), 21, 1, (57), 10.1186/s12985-024-02326-w). Virology Journal doi: 10.1186/s12985-024-02341-x
- Gunnveig Grødeland, Rebecca Jane Cox, Bethen Steenbuch, Lene Skogstrøm, Kjersti Margrethe Rydland, Anne Maagard, Karoline Bragstad, (2023). Nå er vinterens smittebølge her: 77.000 sårbare barn er ikke vaksinert.
- Helge Carlsen, Knut Are Tornås, Gunnveig Grødeland, Karoline Bragstad, (2023). FHI overvåker ny og svært forandret koronavariant.
- Birgitte Klüwer, Kjersti Margrethe Rydland, Margrethe Greve-Isdahl, Karoline Bragstad, Are Stuwitz Berg, (2022). Flere barn bør få influensavaksine. Tidsskrift for Den norske legeforening (Tidsskriftet) doi: 10.4045/tidsskr.22.0678
- Gunnveig Grødeland, Karoline Bragstad, Jon Kåre Time, (2022). Hva om pandemien ikke er over likevel?.
- Robert Whittaker, Anja Bråthen Kristofferson, Elina Seppälä, Beatriz Valcarcel Salamanca, Lamprini Veneti, Margrethe Larsdatter Storm, Håkon Bøås, Nina Aasand, Umaer Naseer, Karoline Bragstad, Reidar Kvåle, Karan Golestani, Siri Feruglio, Line Vold, Karin Nygård, Eirik Alnes Buanes, (2021). Trajectories of hospitalisation for patients infected with SARS-CoV-2 variant B.1.1.7 in Norway, December 2020 – April 2021. Journal of Infection doi: 10.1016/j.jinf.2021.07.025
- Angeliki Melidou, Eeva Broberg, Cornelia Adlhoch, René Snacken, Pasi Penttinen, Dmitriy Pereyaslov, Caroline Brown, Monika Redlberger-Fritz, Therese Popow-Kraupp, Isabelle Thomas, Cyril Barbezange, Nathalie Bossuyt, Helena Jirincova, Alexander Nagy, Ramona Trebbien, Thea K. Fischer, Niina Ikonen, Anu Haveri, Outi Lyytikäinen, Satu Murtopuro, Sylvie Behillil, Vincent Enouf, Sylvie van der Werf, Alessandra Falchi, Martine Valette, Bruno Lina, Brunhilde Schweiger, Barbara Biere, Susanne Duwe, Marianne Wedde, Silke Buda, Andreas Mentis, Athanasios Kossyvakis, Vasiliki Pogka, Anna Papa-Konidari, Angeliki Melidou, Georgia Gioula, Maria Exindari, Linda Dunford, Jeff Connell, Grainne Tuite, Margaret Duffy, Joanne Moran, Bridget Hogg, Allison Waters, Cillian de Gascun, Lisa Domegan, Joan O'Donnell, Michael Joyce, Maria Rita Castrucci, Simona Puzelli, Caterina Rizzo, Antonino Bella, Francesco Maraglino, Dinagul Otorbaeva, Gulbarchyn Saparova, Natalija Zamjatina, Gatis Pakarna, Raina Nikiforova, Joël Mossong, Matthias Opp, Adam Meijer, Pieter Overduin, Marit de Lange, Anne Teirlinck, Guus Rimmelzwaan, Ruud van Beek, Marion Koopmans, Gé Donker, Olav Hungnes, Karoline Bragstad, Raquel Guiomar, Pedro Pechirra, Paula Cristóvão, Inês Costa, Patricia Conde, Ana Paula Rodrigues, Alina Elena Ivanciuc, Elena Burtseva, Elena Kirillova, Evgeniya Mukasheva, Elena Tichá, Katarina Prosenc, Nataša Berginc, Francisco Pozo, Inmaculada Casas, Amparo Larrauri, Jesús Oliva, Concha Delgado, Raúl Ortiz de Lejarazu Leonardo, Mia Brytting, Åsa Wiman, Samuel Cordey, Ana Rita Goncalves, Damir Perisa, Rita Born, Joanna Ellis, Monica Galiano, Catherine Thompson, Maria Zambon, (2018). Erratum to “Predominance of influenza A(H3N2) virus genetic subclade 3C.2a1 during an early 2016/17 influenza season in Europe – Contribution of surveillance data from World Health Organization (WHO) European region to the WHO vaccine composition consultation for northern hemisphere 2017/18” [Vaccine 35 (2017) 4828–4835] (S0264410X17309659) (10.1016/j.vaccine.2017.07.057)). Vaccine s. 2740-2741. doi: 10.1016/j.vaccine.2017.12.039
- Ragnhild Tønnessen, Karoline Bragstad, Siri Helene Hauge, Torstein Aune, Svein Arne Nordbø, Carola Grub, Reidar Hjetland, Elling Ulvestad, Olav B. Natås, Nils Grude, Anne-Marte Bakken Kran, Olav Hungnes, (2014). Laboratoriebasert overvåkning av alvorlig influensa - et pilotprosjekt sesongen 2014/2015.