What you should know in preparation for the 2012-2013 Influenza Season.
What sort of flu season is expected this year?
Flu seasons are unpredictable in a number of ways. Although epidemics of flu happen every year, the timing, severity, and length of the epidemic depends on many factors, including what influenza viruses are spreading, whether they match the viruses in the vaccine, and how many people get the vaccine.
When will flu activity begin and when will it peak?
The timing of flu is very unpredictable and can vary from season to season. Flu activity most commonly peaks in the U.S. in January or February. However, seasonal flu activity can begin as early as October and continue to occur as late as May. The 2011-2012 season began late and was relatively mild compared with previous seasons (see 2011-2012 Flu Season Draws to a Close for more information). It is not possible to predict how mild or severe the 2012-2013 season will be.
Will new flu viruses circulate this season?
Flu viruses are constantly changing so it’s not unusual for new flu viruses to appear each year. For more information about how flu viruses change, visit How the Flu Virus Can Change.