No Pandemic, but You Still Need to Worry About Flu

摘要

The world healthrnOrganization declared the H1N1 pandemic over in July, but the virus is still circulating. Here's what you need to know to protect yourself against influenza this season.rnQ: Which flu strains are included in this year's vaccine? A: The seasonal flu vaccine protects against three strains of influenza: the 2009 H1N1, an H3N2 strain and a B strain of the virus.