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3:30pm, May 16, 2014

Building a better vaccine

A whooping cough vaccine introduced in the 1990s has fewer side effects than its predecessor, but it may not protect against the disease as well, Nathan Seppa reported in “Whooping cough bounces back” (SN: 4/19/14, p. 22). The old vaccine used whole cells of the pertussis bacterium, while the new acellular vaccine uses only components of the disease-causing cells.

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