Håkon Bøås
Senior Advisor
Contact
Department
Projects and publications
- Elina Marjukka Seppälä, Håkon Bøås, Jesper Dahl, Jeanette Stålcrantz, Melanie Stecher, Ragnhild Tønnessen, Gunnar Øyvind Isaksson Rø, Hilde Kløvstad, Trine Hessevik Paulsen, (2025). Registry-Based Surveillance of Severe Acute Respiratory Infections in Norway During 2021–2024. Influenza and Other Respiratory Viruses doi: 10.1111/irv.70080
- Petter Langlete, Hanne-Merete Eriksen-Volle, Trine Hessevik Paulsen, Ragnhild Raastad, Mette Fagernes, Håkon Bøås, Jan Peter William Himmels, (2025). Healthcare-associated COVID-19 infections and mortality. Journal of Hospital Infection s. 61-68. doi: 10.1016/j.jhin.2025.01.008
- Beatriz Valcarcel Salamanca, Pascale Renée Cyr, Yngvild Emblem Bentdal, Sara Sofie Viksmoen Watle, Astrid Louise Wester, Åse Marie Wikman Strand, Håkon Bøås, (2024). Increase in invasive group A streptococcal infections (iGAS) in children and older adults, Norway, 2022 to 2024. Eurosurveillance doi: 10.2807/1560-7917.ES.2024.29.20.2400242
- Lore Merdrignac, Fatima Aït El Belghiti, Elisabetta Pandolfi, Lesly Acosta, Kateřina Fabiánová, Adele Habington, Manuel García Cenoz, Håkon Bøås, Julie Toubiana, Alberto E. Tozzi, Iolanda Jordan, Jana Zavadilová, Niam O'Sullivan, Ana Navascués, Elmira Flem, Ilena Croci, Mireia Jané, Pavla Křížová, Suzanne Cotter, Leticia Fernandino, Terese Bekkevold, Carmen Muñoz-Almagro, Sabrina Bacci, Piotr Kramarz, Esther Kissling, Camelia Savulescu, (2024). Effectiveness of one and two doses of acellular pertussis vaccines against laboratory-confirmed pertussis requiring hospitalisation in infants: Results of the PERTINENT sentinel surveillance system in six EU/EEA countries, December 2015 – December 2019. Vaccine s. 2370-2379. doi: 10.1016/j.vaccine.2024.02.090
- Håkon Bøås, Lise Beier Havdal, Ketil Størdal, Henrik Døllner, Truls Michael Leegaard, Terese Bekkevold, Elmira Flem, Christopher Inchley, Svein Arne Nordbø, Astrid Rojahn, Sara Debes, Bjørn Barstad, Elisebet Haarr, Anne-Marte Bakken Kran, (2024). No association between disease severity and respiratory syncytial virus subtypes RSV-A and RSV-B in hospitalized young children in Norway. PLOS ONE doi: 10.1371/journal.pone.0298104
- 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
- Richard Osei-Yeboah, Peter Spreeuwenberg, Marco Del Riccio, Thea K. Fischer, Amanda Marie Egeskov-Cavling, Håkon Bøås, Michiel van Boven, Xin Wang, Toni Lehtonen, Mathieu Bangert, Harry Campbell, John Paget, (2023). Estimation of the Number of Respiratory Syncytial Virus-Associated Hospitalizations in Adults in the European Union. Journal of Infectious Diseases s. 1539-1548. doi: 10.1093/infdis/jiad189
- Anne C. Teirlinck, Caroline K Johannesen, Eeva K. Broberg, Pasi Penttinen, Harry Campbell, Harish Nair, Rachel M. Reeves, Håkon Bøås, Mia Brytting, Wei Cai, AnnaSara Carnahan, Jean-Sebastien Casalegno, Kostas Danis, Cillian De Gascun, Joanna Ellis, Hanne-Dorthe Emborg, Manuel Gijon, Raquel Guiomar, Siddhivinayak S. Hirve, Helena Jiřincová, Hanna Nohynek, Jesus Angel Oliva, Richard Osei-Yeboah, John Paget, Gatis Pakarna, Richard Pebody, Lance Presser, Marie Rapp, Janine Reiche, Ana Paula Rodrigues, Elina Marjukka Seppälä, Maja Socan, Karol Szymanski, Ramona Trebbien, Jaromíra Večeřová, Sylvie van der Werf, Maria Zambon, Adam Meijer, Thea K. Fischer, (2023). New perspectives on respiratory syncytial virus surveillance at the national level: lessons from the COVID-19 pandemic. European Respiratory Journal s. 1-7. doi: 10.1183/13993003.01569-2022
- Håkon Ihle-Hansen, Håkon Bøås, German Tapia, Guri Hagberg, Hege Beathe Ihle-Hansen, Jacob Dag Berild, Randi Marie Selmer, Øystein Karlstad, Hanne Løvdal Gulseth, Inger Ariansen, (2023). Stroke After SARS-CoV-2 mRNA Vaccine: A Nationwide Registry Study. Stroke s. e190-e193. doi: 10.1161/STROKEAHA.122.040430
- 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
- Xin Wang, You Li, Harish Nair, Harry Campbell, Rachel M. Reeves, Maarten van Wijhe, Thea Kølsen Fischer, Lone Simonsen, Ramona Trebbien, Sabine Tong, Mathieu Bangert, Clarisse Demont, Toni Lehtonen, Terho Heikkinen, Anne Teirlinck, Michiel van Boven, Wim van der Hoek, Nicoline van der Maas, Adam Meijer, Liliana Vazquez Fernandez, Håkon Bøås, Terese Bekkevold, Elmira Flem, Luca Stona, Irene Speltra, Carlo Giaquinto, Arnaud Cheret, Amanda Leach, Sonia Stoszek, Philippe Beutels, Louis Bont, Andrew Pollard, Peter Openshaw, Michael Abram, Kena Swanson, Brian Rosen, Eva Molero, (2022). Time-Varying Association Between Severe Respiratory Syncytial Virus Infections and Subsequent Severe Asthma and Wheeze and Influences of Age at the Infection. Journal of Infectious Diseases s. S38-S44. doi: 10.1093/infdis/jiab308
- Paz Lopez-Doriga Ruiz, Nina Gunnes, Jon Michael Gran, Øystein Karlstad, Randi Marie Selmer, Jesper Dahl, Håkon Bøås, Richard Aubrey White, Aurora Christine Hofman, Trine Hessevik Paulsen, Sara Sofie Viksmoen Watle, Anette Hylen Ranhoff, Geir Bukholm, Hanne Løvdal Gulseth, German Tapia, (2022). Short-term safety of COVID-19 mRNA vaccines with respect to all-cause mortality in the older population in Norway. Vaccine s. 323-332. doi: 10.1016/j.vaccine.2022.10.085
- Rachel M. Reeves, Maarten Van Wijhe, Toni Lehtonen, Luca Stona, Anne C. Teirlinck, Liliana Vazquez Fernandez, You Li, Richard Osei-Yeboah, Thea K. Fischer, Terho Heikkinen, Michiel van Boven, Håkon Bøås, Daniele Donà, Elisa Barbieri, Harry Campbell, (2022). A Systematic Review of European Clinical Practice Guidelines for Respiratory Syncytial Virus Prophylaxis. Journal of Infectious Diseases s. S110-S116. doi: 10.1093/infdis/jiac059
- Caroline Klint Johannesen, Maarten van Wijhe, Sabine Tong, Liliana Vazquez Fernandez, Terho Heikkinen, Michiel van Boven, Xin Wang, Håkon Bøås, You Li, Harry Campbell, John Paget, Luca Stona, Anne C. Teirlinck, Toni Lehtonen, Hanna Nohynek, Mathieu Bangert, Thea K. Fischer, (2022). Age-Specific Estimates of Respiratory Syncytial Virus-Associated Hospitalizations in 6 European Countries: A Time Series Analysis. Journal of Infectious Diseases doi: 10.1093/infdis/jiac150
- Xin Wang, You Li, Liliana Vazquez Fernandez, Anne C. Teirlinck, Toni Lehtonen, Maarten van Wijhe, Luca Stona, Mathieu Bangert, Rachel M. Reeves, Håkon Bøås, Michiel van Boven, Terho Heikkinen, Caroline Klint Johannesen, Eugenio Baraldi, Daniele Donà, Sabine Tong, Harry Campbell, (2022). Respiratory Syncytial Virus-Associated Hospital Admissions and Bed Days in Children <5 Years of Age in 7 European Countries. Journal of Infectious Diseases s. S22-S28. doi: 10.1093/infdis/jiab560
- Håkon Bøås, Terese Bekkevold, Lise Beier Havdal, Anne-Marte Bakken Kran, Astrid Rojahn, Ketil Størdal, Sara Debes, Henrik Døllner, Svein Arne Nordbø, Bjørn Barstad, Elisebet Haarr, Liliana Vazquez Fernandez, Britt Nakstad, Truls Michael Leegaard, Olav Hungnes, Elmira Flem, (2022). The burden of hospital-attended influenza in Norwegian children. Frontiers in Pediatrics doi: 10.3389/fped.2022.963274
- Lise Beier Havdal, Håkon Bøås, Terese Bekkevold, Anne-Marte Bakken Kran, Astrid Rojahn, Ketil Størdal, Sara Debes, Henrik Døllner, Svein Arne Nordbø, Bjørn Barstad, Elisebet Haarr, Liliana Vazquez Fernandez, Britt Nakstad, Christopher Inchley, Elmira Flem, (2022). Risk factors associated with severe disease in respiratory syncytial virus infected children under 5 years of age. Frontiers in Pediatrics doi: 10.3389/fped.2022.1004739
- 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
- Robert Neil Whittaker, Margrethe Greve-Isdahl, Håkon Bøås, Pål Suren, Eirik Alnes Buanes, Lamprini Veneti, (2022). COVID-19 Hospitalization Among Children <18 Years by Variant Wave in Norway. Pediatrics doi: 10.1542/peds.2022-057564
- Elina Marjukka Seppälä, Anja Bråthen Kristoffersen, Håkon Bøås, Didrik Frimann Vestrheim, Margrethe Greve-Isdahl, Birgitte Freiesleben De Blasio, Anneke Steens, (2022). Pertussis epidemiology including direct and indirect effects of the childhood pertussis booster vaccinations, Norway, 1998–2019. Vaccine s. 3142-3149. doi: 10.1016/j.vaccine.2022.04.038
- 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
- Michiel Van Boven, Anne C. Teirlinck, Adam Meijer, Mariëtte Hooiveld, Christiaan H. Van Dorp, Rachel M. Reeves, Harry Campbell, Wim Van Der Hoek, Rachel M. Reeves, You Li, Harry Campbell, Harish Nair, Maarten Van Wijhe, Thea Kølsen Fischer, Lone Simonsen, Ramona Trebbien, Sabine Tong, Scott Gallichan, Mathieu Bangert, Clarisse Demont, Toni Lehtonen, Terho Heikkinen, Anne Teirlinck, Wim Van Der Hoek, Nicoline Van Der Maas, Adam Meijer, Liliana Vazquez Fernandez, Håkon Bøås, Terese Bekkevold, Elmira Flem, Luca Stona, Irene Speltra, Carlo Giaquinto, Arnaud Cheret, Amanda Leach, Sonia Stoszek, Philippe Beutels, Louis Bont, Andrew Pollard, Peter Openshaw, Michael Abram, Kena Swanson, Brian Rosen, Eva Molero, (2021). Estimating transmission parameters for respiratory syncytial virus and predicting the impact of maternal and pediatric vaccination. Journal of Infectious Diseases s. S688-S694. doi: 10.1093/INFDIS/JIAA424
- Lore Merdrignac, Fatima Aït El Belghiti, Elisabetta Pandolfi, Mireia Jané, Jane Murphy, Kateřina Fabiánová, Manuel García Cenoz, Elmira Flem, Sophie Guillot, Alberto E. Tozzi, Gloria Carmona, Adele Habington, Jana Zavadilová, Ana Navasués, Håkon Bøås, Daniel Lévy-Brühl, Beatrice Ferretti, Miguel Lanaspa, Niam O'Sullivan, Pavla Křížová, Leticia Fernandino, Terese Bekkevold, Thomas Hanslik, Carmen Muñoz-Almagro, Sabrina Bacci, Gianfranco Spiteri, Marta Valenciano, Alain Moren, (2021). Incidence and severity of pertussis hospitalisations in infants aged less than 1 year in 37 hospitals of six EU/EEA countries, results of PERTINENT sentinel pilot surveillance system, December 2015 to December 2018. Eurosurveillance doi: 10.2807/1560-7917.ES.2021.26.4.1900762
- Lise Beier Havdal, Håkon Bøås, Terese Bekkevold, Anne-Marte Bakken Kran, Astrid Rojahn, Ketil Størdal, Sara Molvig Debes, Henrik Døllner, Svein Arne Nordbø, Bjørn Barstad, Elisebet Haarr, Liliana Vazquez Fernandez, Britt Nakstad, Christopher Inchley, Elmira Flem, (2021). The burden of respiratory syncytial virus in children under 5 years of age in Norway. Journal of Infection s. 205-215. doi: 10.1016/j.jinf.2021.12.008
- 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
- Anne C. Teirlinck, Eeva K. Broberg, Are Stuwitz Berg, Harry Campbell, Rachel M. Reeves, AnnaSara Carnahan, Bruno Lina, Gatis Pakarna, Håkon Bøås, Hanna Nohynek, Hanne-Dorthe Emborg, Harish Nair, Janine Reiche, Jesus Angel Oliva, Joanne O’Gorman, John Paget, Karol Szymanski, Kostas Danis, Maja Socan, Manuel Gijon, Marie Rapp, Martina Havlíčková, Ramona Trebbien, Raquel Guiomar, Siddhivinayak S. Hirve, Silke Buda, Sylvie van der Werf, Adam Meijer, Thea K. Fischer, (2021). Recommendations for respiratory syncytial virus surveillance at the national level. European Respiratory Journal doi: 10.1183/13993003.03766-2020
- Rachel M. Reeves, Maarten van Wijhe, Sabine Tong, Toni Lehtonen, Luca Stona, Anne C Teirlinck, Liliana Vazquez Fernandez, You Li, Carlo Giaquinto, Thea Kølsen Fischer, Clarisse Demont, Terho Heikkinen, Irene Speltra, Michiel van Boven, Håkon Bøås, Harry Campbell, (2020). Respiratory Syncytial Virus-Associated Hospital Admissions in Children Younger Than 5 Years in 7 European Countries Using Routinely Collected Datasets. Journal of Infectious Diseases s. S599-S605. doi: 10.1093/infdis/jiaa360
- Benedicte Marie Jørgenrud, Lars Christian Stene, German Tapia, Håkon Bøås, Milaim Pepaj, Jens Petter Berg, Per Medbøe Thorsby, Matej Oresic, Tuulia Hyötyläinen, Kjersti Skjold Rønningen, (2017). Longitudinal plasma metabolic profiles, infant feeding, and islet autoimmunity in the MIDIA study. Pediatric Diabetes s. 111-119. doi: 10.1111/pedi.12360
- Nicolai Andre Lund-Blix, Kjersti Skjold Rønningen, Håkon Bøås, German Tapia, Lene Frost Andersen, (2016). Plasma phospholipid pentadecanoic acid, EPA, and DHA, and the frequency of dairy and fish product intake in young children. Food & Nutrition Research (FNR) doi: 10.3402/fnr.v60.31933
- German Tapia, Håkon Bøås, Eric De Muinck, Ondrej Cinek, Lars Christian Stene, Peter A Torjesen, Trond Rasmussen, Kjersti Skjold Rønningen, (2015). Saffold Virus, a Human Cardiovirus, and Risk of Persistent Islet Autoantibodies in the Longitudinal Birth Cohort Study MIDIA. PLOS ONE doi: 10.1371/journal.pone.0136849
- Håkon Bøås, German Tapia, Trond Rasmussen, Kjersti Skjold Rønningen, (2014). Enterobius vermicularis and allergic conditions in Norwegian children. Epidemiology and Infection s. 2114-2120. doi: 10.1017/S0950268813003154
- Håkon Bøås, German Tapia, John Arne Sødahl, Trond Rasmussen, Kjersti Skjold Rønningen, (2012). Enterobius vermicularis and Risk Factors in Healthy Norwegian Children. The Pediatric Infectious Disease Journal s. 927-930. doi: 10.1097/INF.0b013e318258cdb5
- 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.
- 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.
- Håkon Bøås, Kjersti Skjold Rønningen, Bjørn Grinde, (2015). Pinworms and viral infections in early childhood: epidemiological studies of relevance for the hygiene hypothesis.
- Lise Beier Havdal, Håkon Bøås, Terese Bekkevold, Anne-Marte Bakken Kran, Astrid Rojahn, Ketil Størdal, Sara Molvig Debes, Henrik Døllner, Svein Arne Nordbø, Bjørn Barstad, Elisebet Haarr, Liliana Vázquez Fernández, Britt Nakstad, Christopher Inchley, Elmira Flem, (2022). Corrigendum to ‘The burden of respiratory syncytial virus in children under 5 years of age in Norway’ [Journal of Infection Volume 84, Issue 2 (2022) Pages 205-215, (S0163445321005995), (10.1016/j.jinf.2021.12.008)]. Journal of Infection doi: 10.1016/j.jinf.2022.12.018
- 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