You are using an older browser version. Please use a supported version for the best MSN experience.

How effective is the flu vaccine this year?

U.S. health officials say there are signs that this may be a rough flu season. Over 7,000 cases have been confirmed, which is more than double what they were this time last year. Dr. Pardis Sabeti, a Harvard professor and an infectious disease expert, joins "CBS This Morning" to discuss how effective the flu vaccine is this year and what to expect this winter season.
image beaconimage beaconimage beacon