A United States Center for Disease Control and Prevention (CDC) vaccine advisory committee voted to approve FluMist, the nasal spray influenza vaccine, for the 2018-2019 flu season. This marks the first time the nasal spray will return after a two season hiatus in which concerns were raised about its effectiveness, particularly against the H1N1 strand…. Read more »
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WHY FLU VACCINES ARE LESS EFFECTIVE CERTAIN YEARS
According to the CDC, vaccine effectiveness during the 2015-2016 flu season was 47%, but for the 2014-2015 season, effectiveness was just 19%. Variances in effectiveness from year to year can be caused by a variety of factors. As detailed in prior blog entries, each year before the flu season begins, a vaccine is made based… Read more »