Illinois Department of Public Health:  The Illinois Department of Public Health provides this Influenza Surveillance Page. 

CDC's FLU Page: This page from the Federal Government's CDC provides information for health consumers and health providers that includes prevention, symptoms, treatment, the current state of the disease in all fifty state. Whatever you need, the CDC has it.

World Health Organization (WHO) Influenza Page: Much like the US CDC, WHO provides information about flu and tracks its spread, but on a world-wide, rather than merely national, level.

Information about the FLU VACCINE from the CDC