An illustration depicts a 3D, computer-generated image of a group of Bordetella pertussis bacteria. If someone infected with pertussis coughs or sneezes, tiny droplets are released that contain the bacteria.
Mandatory Credit: Meredith Newlove/CDC via CNN Newsource
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Whooping cough cases are climbing. Here’s what to know
Cases of whooping cough are climbing across the country this year, with about 6,600 already documented — nearly four times the number at the same point last year.
