Satchel Forrester of Newton, MA, receiving his flu shot flu shot at the Whittier St. Health Center in the Roxbury section of Boston, MA on January 12, 2013. The City of Boston provided over 7000 free flu shots at 22 health centers and clinics across the city after Boston Mayor Thomas M. Menino declared flu emergency. (Photo by Rick Friedman/Corbis via Getty Images)
