This review published by the WHO aims at answering important questions among the Known Unknowns areas which were unclear at the beginning of the 2009 pandemic
The objective of this study was to explore the hypothesis that an intense circulation of rhinoviruses might have reduced the probability of infection by the 2009 pandemic influenza A(H1N1) virus at the beginning of autumn 2009.
The United States Advisory Committee on Immunization Practices (ACIP), which advises the Centers for Disease Control and Prevention (CDC) on vaccine issues, voted to approve a new recommendation on February 24 to offer seasonal influenza vaccination to the whole population aged 6 months and older.