Add Yahoo as a preferred source to see more of our stories on Google. Vaccine research quickly picked up to try to prevent a possible flu pandemic in 1976. AP Photo Nineteen-year-old U.S. Army Pvt.

So sayeth the World Health Organization (WHO)—and they should know, since they were the ones who declared a full, phase six-level pandemic a little more than a year ago. Now it’s done—this morning WHO ...