Feature Health & Medicine 2009 Science News of the Year: Body & Brain By Science News December 18, 2009 at 6:01 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print Numbers of passengers arriving from Mexico in March and April 2008 show which cities would have been most vulnerable to H1N1 transmission. Credit : The New England Journal of Medicine ©2009 H1N1 strikes and spreads Like the years 1957 and 1968, 2009 will be known as a pandemic flu year.
