The latest flu report from the CDC finds surge in cases, with widespread flu found in 29 states. NBC's Erika Edwards reports that a mutation may have made immunizations a little less effective, but it's still better than no protection at all.
NBC News: Nation
Sat, 12/20/2014 - 10:07am
The latest flu report from the CDC finds surge in cases, with widespread flu found in 29 states. NBC's Erika Edwards reports that a mutation may have made immunizations a little less effective, but it's still better than no protection at all.