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2. Updated recommendations for use of tetanus toxoid, reduced diphtheria toxoid and acellular pertussis (Tdap) vaccine from the Advisory Committee on Immunization Practices, 2010;MMWR. Morbidity and Mortality Weekly Report,2011
3. 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 aged <12 months. Advisory Committee on Immunization Practices (ACIP), 2011;MMWR. Morbidity and Mortality Weekly Report,2011
4. Updated recommendations for use of tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis vaccine (Tdap) in pregnant women. Advisory Committee on Immunization Practices (ACIP), 2012;MMWR. Morbidity and Mortality Weekly Report,2013
5. Pertussis immunisation and control in England and Wales, 1957 to 2012: a historical review;Amirthalingam;Eurosurveillance,2013