The flu is different from a cold and usually appears without warning signs. Learn the symptoms, types of vaccines available, and who is at risk. (Previous item number: 561X)
Source: U.S. Department of Health and Human Services, Food and Drug Administration, Office of Women's Health Released: 2010 Pages: 2 Publication ID: 5796 Item number: 561Y ISBN: 978-1-61221-020-9
