Household transmission of 2009 H1N1 highest in those under 18 years old.
While many "top" issues could be listed, the 2009 H1N1 influenza pandemic has received enormous press in both the medical and lay press. This epidemic has taught us a great deal. As of this date, there have been fewer deaths than from previous flu pandemics--and that is the good news! A new analysis of household transmissibility of H1N1 showed that persons 18 years of age or younger were twice as susceptible as those 19-50 years of age; and those 50 or older were even less susceptible. Most transmissions occurred fairly quickly.