Protection weaker with new pertussis vax

The old, whole-cell pertussis vaccine gave better protection against the disease than the current, acellular vaccine, Australian research finds.

The study of 40,000 Queensland children found those given a full course of the acellular vaccine were 2.5 times more likely to contract pertussis up to 2009 than those who received only the whole-cell vaccine.

And during the 2009-2011 epidemic, children given a full course of the acellular vaccine were 3.3

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