ATLANTA (AP) - U.S. health officials say the flu vaccine has again turned out to be a big disappointment.
The vaccine didn't work against a flu bug that popped up halfway through the flu season. Figures released Thursday show the vaccine was only 29% effective overall.
The Centers for Disease Control and Prevention says the vaccine turned out to be a mismatch against the later strain.
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6/27/2019 9:37:16 AM (GMT -4:00)