Risk factors
By Mayo Clinic staffWhooping cough is thought to be on the rise for two main reasons. The whooping cough vaccine you receive as a child eventually wears off. This leaves most teenagers and adults susceptible to the infection during an outbreak — and there continue to be regular outbreaks. In addition, children aren't fully immune to whooping cough until they've received at least three shots, leaving those 6 months and younger at greatest risk of contracting the infection.
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- Centers for Disease Control and Prevention. Updated recommendations for use of tetanus toxoid, reduced diphtheria toxoid and acellular pertussis vaccine (Tdap) in pregnant women and persons who have or anticipate having close contact with an infant <12 months. 2011;60:1424. http://www.cdc.gov/mmwr/preview/mmwrhtml/mm6041a4.htm?s_cid=mm6041a4_e%0d%0a. Accessed Dec. 6, 2011.
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- Byrd EM, et al. Treatment and prevention of Bordetella pertussis infection in adolescents and adults. http://www.uptodate.com/home/index.html. Accessed Dec. 6, 2011.
- Recommended immunization schedule for adults aged 19 years and older — United States, 2013. Centers for Disease Control and Prevention http://www.cdc.gov/vaccines/schedules/hcp/child-adolescent.html. Accessed Feb. 19, 2013.
- Recommended immunization schedule for persons aged 0 through 18 years — United States, 2013. Centers for Disease Control and Prevention http://www.cdc.gov/vaccines/schedules/hcp/child-adolescent.html. Accessed Feb. 19, 2013.


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