sábado, 22 de abril de 2017

Disease Burden of Influenza | Seasonal Influenza (Flu) | CDC

Disease Burden of Influenza | Seasonal Influenza (Flu) | CDC

CDC

Disease Burden of Influenza

The severity of influenza disease in the U.S. can vary widely and is determined by a number of factors including the characteristics of circulating viruses, timing of the season, how well the vaccine is working to protect against the illness, and how many people get vaccinated.
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Disease Burden of Influenza | Seasonal Influenza (Flu) | CDC

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