Influenza
| Influenza Vaccine Influenza is a contagious respiratory disease that affects between 5% and 20% of the U.S. population each year. Help protect your family with an influenza vaccine. | |
| American Experience: Influenza, 1918 - the story of the worst epidemic the United States has ever known, which killed more Americans than all the combat deaths of this century combined. | |
| Center for Disease Control: Influenza - includes general information, as well as info on the types of flu viruses in the United States. | |
| Influenza A Virus Replication - map of how the virus attacks cells and reproduces. | |
| NIAID Fact Sheet - significance, transmission, symptoms, and treatment. | |