This Sept. 19, 2011 photo shows an empty bottle of tetanus, diphtheria and pertussis (whooping cough) vaccine on display at a high school in Sacramento, Calif.Â
Rich Pedroncelli, Associated Press
This 2016 illustration provided by the Centers for Disease Control and Prevention, based on electron microscope imagery, depicts Bordetella pertussis bacteria, which causes whooping cough.
Meredith Newlove, Centers for Disease Control and Prevention
AP data journalist Kasturi Pananjady contributed to this report.
The Associated Press Health and Science Department receives support from the Howard Hughes Medical Institute's Science and Educational Media Group and the Robert Wood Johnson Foundation. The AP is solely responsible for all content.
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Survivors say the fact that few young Americans know about polio compounds their suffering. Here's what they want everyone to know.
This Sept. 19, 2011 photo shows an empty bottle of tetanus, diphtheria and pertussis (whooping cough) vaccine on display at a high school in Sacramento, Calif.Â
This 2016 illustration provided by the Centers for Disease Control and Prevention, based on electron microscope imagery, depicts Bordetella pertussis bacteria, which causes whooping cough.
Meredith Newlove, Centers for Disease Control and Prevention