Results 21 to 30 of about 113,976,979 (200)

Reduced neutralising antibody responses against emerging 2025/26 influenza A(H1N1)pdm09 subclade D.3.1 and A(H3N2) subclade K viruses among healthcare workers, Finland, August to October 2025 [PDF]

Eurosurveillance
During autumn 2025, drifted influenza A(H3N2) subclade K and A(H1N1)pdm09 subclade D.3.1. and D.3.1.1 viruses were detected in Finland. We assessed antibody responses against 2024/25 vaccine and 2025/26 epidemic influenza A strains among 46 Finnish ...
Hanna Nohynek
doaj   +2 more sources

Assessment of pre and postinfection immunity to the hemagglutinin proteins of Influenza A(H1N1)pdm09 and Influenza A(H3N2) in India: a retrospective longitudinal study [PDF]

Virology Journal
Background Hemagglutinin (HA), one of the main surface glycoproteins of the influenza virus, is essential for viral entry into host cells. Antibodies targeting HA can neutralize the virus, offering protection against infection.
Anup Jayaram, Desmond Cardoso, Arun M.T., Prasad Varamballi, Kavitha Karunakaran, Prachi Malsane, Sudheesh N., Ujwal Shetty, Naren Babu N., Chiranjay Mukhopadhyay, Anitha Jagadesh   +10 more
doaj   +2 more sources

Characterization of Influenza A(H1N1)pdm09 Viruses Isolated in the 2018–2019 and 2019–2020 Influenza Seasons in Japan [PDF]

Viruses, 2023
The influenza A(H1N1)pdm09 virus that emerged in 2009 causes seasonal epidemic worldwide. The virus acquired several amino acid substitutions that were responsible for antigenic drift until the 2018–2019 influenza season.
Takuma Soga, Calvin Duong, David Pattinson, Yuko Sakai-Tagawa, Akifumi Tokita, Naomi Izumida, Tamon Nishino, Haruhisa Hagiwara, Noriyuki Wada, Yumi Miyamoto, Haruo Kuroki, Yuka Hayashi, Masafumi Seki, Natsuko Kasuya, Michiko Koga, Eisuke Adachi, Kiyoko Iwatsuki-Horimoto, Hiroshi Yotsuyanagi, Seiya Yamayoshi, Yoshihiro Kawaoka   +19 more
doaj   +2 more sources

Risk factors associated with influenza A (H1N1)pdm09: a nested case control study of TB patients with ILI in Lahore District, Pakistan [PDF]

BMC Infectious Diseases
Background Co-morbidity with respiratory viruses including influenza A, cause varying degree of morbidity especially in TB patients compared to general population.
Gulshan Umbreen, Abdul Rehman, Sadaf Aslam, Chanda Jabeen, Muhammad Iqbal, Aayesha Riaz, Shakera Sadiq, Rubab Maqsood, Hamad Bin Rashid, Saira Afzal, Nimra Arshad, Muhammad Hassan Mushtaq, Mamoona Chaudhry   +12 more
doaj   +2 more sources

Analysis of fatal outcomes from influenza A(H1N1)pdm09 in Mongolia

Western Pacific Surveillance and Response, 2012
Introduction: While influenza A(H1N1)pdm09 usually causes mild illness in the majority of people, there have been reports of severe cases and deaths. As there is no documented evidence on fatal outcomes from influenza in Mongolia previously, we aimed to ...
Jantsansengeegiin Baigalmaa, Tseesurengiin Tuul, Badarchyn Darmaa, Erdenebaatariin Soyolmaa   +3 more
doaj   +3 more sources

Effect of Prior Influenza A(H1N1)pdm09 Virus Infection on Pathogenesis and Transmission of Human Influenza A(H5N1) Clade 2.3.4.4b Virus in Ferret Model [PDF]

Emerging Infectious Diseases
Reports of human infections with influenza A(H5N1) clade 2.3.4.4b viruses associated with outbreaks in dairy cows in the United States underscore the need to assess the potential cross-protection conferred by existing influenza immunity.
Xiangjie Sun, Jessica A. Belser, Zhu-Nan Li, Nicole Brock, Joanna A. Pulit-Penaloza, Troy J. Kieran, Claudia Pappas, Hui Zeng, Jessie C. Chang, Paul J. Carney, Brandon L. Bradley-Ferrell, James Stevens, Terrence M. Tumpey, Min Z. Levine, Taronna R. Maines   +14 more
doaj   +2 more sources

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 [PDF]

Virology Journal
Background Non-pharmaceutical interventions implemented during the COVID-19 pandemic resulted in a marked reduction in influenza infections globally. The absence of influenza has raised concerns of waning immunity, and potentially more severe influenza ...
Even Fossum, Andreas Rohringer, Torstein Aune, Kjersti Margrethe Rydland, Karoline Bragstad, Olav Hungnes   +5 more
doaj   +2 more sources

Incidence and epidemiology of hospitalized influenza cases in rural Thailand during the influenza A (H1N1)pdm09 pandemic, 2009-2010. [PDF]

PLoS ONE, 2012
BACKGROUND: Data on the burden of the 2009 influenza pandemic in Asia are limited. Influenza A(H1N1)pdm09 was first reported in Thailand in May 2009.
Henry C Baggett, Malinee Chittaganpitch, Somsak Thamthitiwat, Prabda Prapasiri, Sathapana Naorat, Pongpun Sawatwong, Darunee Ditsungnoen, Sonja J Olsen, James M Simmerman, Prasong Srisaengchai, Somrak Chantra, Leonard F Peruski, Pathom Sawanpanyalert, Susan A Maloney, Pasakorn Akarasewi   +14 more
doaj   +1 more source

Influenza A(H1N1)pdm09 during air travel [PDF]

Travel Medicine and Infectious Disease, 2013
The global spread of the influenza A(H1N1)pdm09 virus (pH1N1) associated with travelers from North America during the onset of the 2009 pandemic demonstrates the central role of international air travel in virus migration. To characterize risk factors for pH1N1 transmission during air travel, we investigated travelers and airline employees from four ...
John, Neatherlin, Elaine H, Cramer, Christine, Dubray, Karen J, Marienau, Michelle, Russell, Hong, Sun, Melissa, Whaley, Kathy, Hancock, Krista K, Duong, Hannah L, Kirking, Christopher, Schembri, Jacqueline M, Katz, Nicole J, Cohen, Daniel B, Fishbein   +13 more
openaire   +2 more sources

High rate of A(H1N1)pdm09 infections among rural Thai villagers, 2009-2010. [PDF]

PLoS ONE, 2014
Pandemic influenza A(H1N1)pdm09 emerged in Thailand in 2009. A prospective longitudinal adult cohort and household transmission study of influenza-like illness (ILI) was ongoing in rural Thailand at the time of emergence.
Benjawan Khuntirat, In-Kyu Yoon, Malinee Chittaganpitch, Whitney S Krueger, Krongkaew Supawat, Patrick J Blair, Shannon D Putnam, Robert V Gibbons, Darunee Buddhari, Pathom Sawanpanyalert, Gary L Heil, John A Friary, Gregory C Gray   +12 more
doaj   +1 more source