Some surveys have shown that nearly 30% of people believe getting a flu shot can actually cause influenza. This belief is likely due to common side effects linked to the vaccine, including headache, ...

Add Yahoo as a preferred source to see more of our stories on Google. People who get a flu shot are less likely to become severely ill, be hospitalized or die. - Kylie Cooper/Reuters/File Flu is ...

Viral mismatch between circulating strains and vaccine may have weighed down effectiveness ...

Add Yahoo as a preferred source to see more of our stories on Google. A vaccine is administered in this file photo. (Elizabeth Conley/Staff Photographer) Houston has seen an active flu season as a new ...