Read the brief history from the website of the National Vaccine Program Office of the U.S. Government's Department of Health and Human Services.
"History suggests that influenza pandemics have probably happened during at least the last four centuries. During the 20th century, three pandemics and several "pandemic scares" occurred. These are described in more detail below."
Tuesday, October 25, 2005
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment