From Ebola to the common cold, the old standby advice still prevails.
Influenza kills 36,000 Americans and 500,000 worldwide each year.
Explorers brought new infectious diseases with them to the Americas.
Already got a flu shot? There’s more you can do to stay healthy.
It takes 2 weeks after a flu shot for the body to develop immunity.
Vaccine gives the body a head start in fighting the virus