There was a broken link in eLetter #316 in the story about the H1N1 Virus. Here is the correct link:

 

 

Vaccines Approved for H1N1 Influenza Virus

The U.S. Food and Drug Administration (FDA) has approved four vaccines for use against the 2009 H1N1 influenza virus.

 

We apologize for our error and any inconvenience this may have caused you.