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Study: Older whooping cough vaccine more effective

from HealthDay News

The older vaccine for whooping cough that was phased out in the late 1990s is more effective than the current version of the vaccine, a new study contends. Teenagers who received four shots with the older vaccine — called whole-cell vaccine — before they were 2 years old were significantly less likely to become infected with whooping cough during a recent outbreak in California, compared to children who received all of their immunizations with the new vaccines, called the acellular vaccine. more

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