Abbreviations: CS, circulating strain; NPA, nasopharyngeal aspirate; NPS, nasopharyngeal
swab; TS, throat swab; VS, vaccine strain. aThe nucleotide sequences of the 12 influenza A …

The trivalent seasonal influenza vaccine was the only approved and available vaccine
during the 2016–2018 influenza seasons. It did not include the B/Yamagata strain. In this …

Since 2010 the WHO has held a series of informal consultations to explore ways of
improving the currently highly complex and time-pressured influenza vaccine virus selection …

Abstract The World Health Organization selects influenza vaccine compositions biannually
to cater to peaks in temperate regions. In tropical and subtropical regions, where influenza …

Abstract Background. Canada's Sentinel Physician Surveillance Network links genetic,
antigenic, and vaccine effectiveness (VE) measures in an integrated platform of influenza …

Influenza viruses are some of the most active pathogens in Taiwan. The monitoring
influenza activity has been coordinated by the Centers for Diseases Control, Taiwan, and …

We monitored the circulating strains and genetic variation among seasonal influenza A and
B viruses in Thailand between July 2017 and March 2020. The hemagglutinin gene was …

The WHO Collaborating Centre for Reference and Research on Influenza in Melbourne is
part of the World Health Organization's (WHO) Global Influenza Surveillance and Response …

Background Lower influenza vaccine effectiveness (VE) against circulating H3N2 strains
compared with other influenza viruses is partly explained by antigenic mismatch between …

The seasonal influenza activity has been dramatically reduced worldwide due to COVID-19
control measures. 1, 2 Only sporadic influenza cases have been detected in Hong Kong …