We haven't updated the recommendations for vaccines since 2010, and since that time now, eight years later, we have more information about the vaccine. Henry Walke More Quotes by Henry Walke More Quotes From Henry Walke We have more information about how the vaccine works, how effective is it is... if there was an event that required a massive vaccination of thousands or even hundreds of thousands of people, not even the exposure we had in 2001. Henry Walke top-news It's hard to predict the future. Henry Walke top-news