Results 71 to 80 of about 17,677 (181)

[The laboratory epidemiological study of the joint circulation of the influenza virus A subtypes A/H1N1/ and A/H3N2/ in Bulgaria].

Zhurnal mikrobiologii, epidemiologii i immunobiologii, 1993
The National Influenza Center of Bulgaria made the epidemiological analysis of the spread of influenza virus, type A, for the period of 11 years on the basis of mass laboratory investigations. Subtype A (H1N1) was found to be the main factor of epidemics in 1978 and 1982, while the epidemics of 1980, 1983, 1985, 1986, 1987 and 1988 were mainly caused ...
Z, Nikolova, R, Kotseva
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Epidemiological and genetic characterization of pH1N1 and H3N2 influenza viruses circulated in MENA region during 2009–2017

BMC Infectious Diseases, 2019
Background Influenza surveillance is necessary for detection of emerging variants of epidemiologic and clinical significance. This study describes the epidemiology of influenza types A and B, and molecular characteristics of surface glycoproteins ...
Hebah A. Al Khatib, Asmaa A. Al Thani, Imed Gallouzi, Hadi M. Yassine   +3 more
doaj   +1 more source

Molecular Epidemiology and Antigenic Characterization of Seasonal Influenza Viruses Circulating in Nepal

Journal of Nepal Health Research Council, 2017
Background: Influenza is one of the public health burdens in Nepal and its epidemiology is not clearly understood. The objective of this study was to explore the molecular epidemiology and the antigenic characteristics of the circulating influenza ...
Bishnu Prasad Upadhyay, Prakash Ghimire, Masato Tashiro, Megha Raj Banjara   +3 more
doaj   +1 more source

Antibody contributes to heterosubtypic protection against influenza A-induced tachypnea in cotton rats

Virology Journal, 2008
Background Influenza virus infection or vaccination evokes an antibody response to viral hemagglutinin (HA) and neuraminidase (NA) surface glycoproteins, which results in immunity against influenza A viruses of the same HA and NA subtype.
Ottolini Martin G, Straight Timothy M, Prince Gregory A, Eichelberger Maryna C   +3 more
doaj   +1 more source

Moderate influenza vaccine effectiveness against A(H1N1)pdm09 virus, and low effectiveness against A(H3N2) subtype, 2018/19 season in Italy

Expert Review of Vaccines, 2019
Background: Influenza vaccines are updated every year to match the vaccine strains with currently circulating viruses; consequently influenza vaccine effectiveness (IVE) has to be assessed annually.Research design and methods: A test-negative case-control study was conducted within the context of the Italian sentinel influenza surveillance network to ...
Bellino, Stefania, Bella, Antonino, Puzelli, Simona, Di Martino, Angela, Facchini, Marzia, Punzo, Ornella, Pezzotti, Patrizio, Castrucci, Maria Rita, Di Mario, G, Calzoletti, L, Fabiani, C, Chironna, Maria, Germinario, C, Tramuto, F, Di Carlo, V, Affanni, P, Pascucci, M. G, D’Agaro, P, Gallo, T, Pagani, E, Natter, B, Camilloni, B, Tosti, A, Pariani, E, Senatore, S, Serra, C, Tanchis, PR, Ghisetti, V Tiberti, D, Romano, L, Volpe, E, Giannecchini, S   +32 more
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Evolution and Vaccine Strain Match of HA and NA Genes of Influenza A/H3N2 Subtype in Riyadh, Saudi Arabia, 2020–2023

Vaccines
Background/Objectives: Although several studies have shed light on the epidemiology of the influenza A/H3N2 subtype in Saudi Arabia, the knowledge regarding the molecular epidemiology and genetic diversity of the A/H3N2 subtype in the Riyadh region is ...
Noorah A. Alkubaisi, Ibrahim M. Aziz, Mohamed A. Farrag, Reem M. Aljowaie, Asma N. Alsaleh, Fatimah N. Alanazi, Fahad N. Almajhdi   +6 more
doaj   +1 more source

Generation and characterization of a cold-adapted attenuated live H3N2 subtype influenza virus vaccine candidate.

Chinese medical journal, 2010
H3N2 subtype influenza A viruses have been identified in humans worldwide, raising concerns about their pandemic potential and prompting the development of candidate vaccines to protect humans against this subtype of influenza A virus. The aim of this study was to establish a system for rescuing of a cold-adapted high-yielding H3N2 subtype human ...
Wen-qi, An, Peng-hui, Yang, Yue-qiang, Duan, De-yan, Luo, Chong, Tang, Wei-hong, Jia, Li, Xing, Xin-fu, Shi, Yu-jing, Zhang, Xiu-fan, Liu, Xi-liang, Wang   +10 more
openaire   +1 more source

Cross-sectional study on protective antibodies against influenza A virus subtypes and cross-protection against influenza A(H3N2) subclade K, Portugal, August 2025

Eurosurveillance
The 2025/26 season was marked by co-circulation of influenza A subtypes, with the first detection of A(H3N2) subclade K in September 2025. In August 2025 in Portugal, 14.8% (95% CI: 12.2–17.8) of 886 persons tested had cross-protective antibodies against this subclade.
Guiomar, Raquel, Henriques, Camila, Pereira da Silva, Susana, Gomes, Licínia, Dias, Daniela, Verdasca, Nuno, Nunes, Baltazar, Rodrigues, Ana Paula, Guimarães, João Tiago, Cardoso, Maria João, Ramos, Angelica, Pereira, Paulo, Castro, Ana Paula, Marques, Maria Helena, Mota, Paula, Ferreira, Ana, Lopes, Paulo, Abreu, Gabriela, Pedrosa, Adriana, Silva, Ana Cristina, de Varzim, Póvoa, Martins, Nádia Sousa, Mesquita, Aurélio, Majar, Marina, Calheiros, Ana Filipa, Mota Freitas, José António, Vieira, Sandra Margarida, Gomes, Susana, Magalhães, Cacilda, Soares, Maria J, Montanha, Maria José, Vaz, Carlos, Silva, Helena, Moreira, Ezequiel, Ferreira, Carla, Lopes, Cristiana, Rodrigues, Fernando, Reis, Teresa, Almeida, Sofia, Amantegui, Patrícia, Costa, Tiago, Fonseca, Patrícia, Marques, Bruno, Moita, Carina, Paulo, Sandra, Rodrigues, Ricardo, Rodrigues Moreira, José Afonso, Fradilha, Mariana, Cunha, Mario, Seabra, Sofia, Pires, Ana, Correia, Sara, Nunes, Diana, Toscano, Cristina, Dias, Ana Paula, Silva, Luís, Luís, João, Rodrigues, Rita, Sancho, Luisa, Coimbra, Lucia, Aliyeva, Elzara, Gama, Paula, Mota, Jóni, Lopes, Ana Helena, Nogueira, Bela, Frota, Ana, Peres, Jéssica, Ramos, Maria João, Caldeira, Filomena, Rodrigues, Carina, Mira, Ana, Serrano, Ana, Moreira, Inês, Barbeiro, Paula, Kronberg, Elena, Falcão, Maria Paula, Louro, Alzira, Gonçalves, Armindo, Loureiro, Ana, Rego, Teresa Garcia, Dias, Maria Teresa, Couto, Ana Rita, Marques, Ana, Alves, José, Freitas, Ludivina, Agostinho, Susana   +85 more
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Neutralization potency of the 2023-24 seasonal influenza vaccine against circulating influenza H3N2 strains

Human Vaccines & Immunotherapeutics
Seasonal influenza is a severe disease that significantly impacts public health, causing millions of infections and hundreds of thousands of deaths each year.
Xiande Huang, Ziqi Cheng, Yake Lv, Weixuan Li, Xiaoyu Liu, Weijin Huang, Chenyan Zhao   +6 more
doaj   +1 more source

Amino acid 138 in the HA of a H3N2 subtype influenza A virus increases affinity for the lower respiratory tract and alveolar macrophages in pigs

PLOS Pathogens
Influenza A virus (FLUAV) infects a wide range of hosts and human-to-swine spillover events are frequently reported. However, only a few of these human viruses have become established in pigs and the host barriers and molecular mechanisms driving adaptation to the swine host remain poorly understood.
Matias Cardenas, Brittany Seibert, Brianna Cowan, Ana Luiza S. Fraiha, Silvia Carnaccini, L. Claire Gay, Flavio Cargnin Faccin, C. Joaquin Caceres, Tavis K. Anderson, Amy L. Vincent Baker, Daniel R. Perez, Daniela S. Rajao   +11 more
openaire   +3 more sources