Changes

==When Flu Occurs==

==When Flu Occurs==

The peak of flu season is winter. The overall health impact (e.g., infections, hospitalizations, and deaths) of a flu season varies from year to year. Seasons are more likely to be severe if the epidemic originates in China. The U.S. [[Centres for Disease Control]] monitors circulating flu viruses and their related disease activity and provides influenza reports each week from October through May.

The peak of flu season is winter. The overall health impact (e.g., infections, hospitalizations, and deaths) of a flu season varies from year to year. Seasons are more likely to be severe if the epidemic originates in China. The U.S. [[Center for Disease Control]] monitors circulating flu viruses and their related disease activity and provides influenza reports each week from October through May.

==Contagion==

==Contagion==