Reply to Kiraly et al

Comment

Maxwell A Witt et al. Clin Infect Dis. 2013 Sep.

. 2013 Sep;57(5):770-1.

doi: 10.1093/cid/cit352. Epub 2013 May 30.

No abstract available

Comment on

Reduced risk of pertussis among persons ever vaccinated with whole cell pertussis vaccine compared to recipients of acellular pertussis vaccines in a large US cohort.
Witt MA, Arias L, Katz PH, Truong ET, Witt DJ. Witt MA, et al. Clin Infect Dis. 2013 May;56(9):1248-54. doi: 10.1093/cid/cit046. Epub 2013 Mar 13. Clin Infect Dis. 2013. PMID: 23487373
Reduced risk of pertussis among persons ever vaccinated with whole-cell pertussis vaccine compared to recipients of acellular pertussis vaccines may have been confounded by age.
Kiraly N, Dharmage SC, Allen KJ. Kiraly N, et al. Clin Infect Dis. 2013 Sep;57(5):770. doi: 10.1093/cid/cit351. Epub 2013 May 30. Clin Infect Dis. 2013. PMID: 23723196 No abstract available.