ABC News January 16, 2015

CDC Warns Flu Vaccine Is Even Less Effective Than Believed

Name: CDC Warns Flu Vaccine Is Even Less Effective Than Believed
Uploaded: 2015-01-16T15:26:13
Duration: PT75.0S
Description: Dr. Richard Besser discusses why this year's vaccine is only effective in about 1 out of 4 cases.

Dr. Richard Besser discusses why this year's vaccine is only effective in about 1 out of 4 cases.

CDC Warns Flu Vaccine Is Even Less Effective Than Believed

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