IL2 and pertussis: At seven weeks of age (prior to pediatric pertussis vaccination), infants from Tdap-IPV-vaccinated pregnancies still had significantly elevated IL-2 responses to B. pertussis, compared to infants from unvaccinated pregnancies (0.99, 95% CI [0.02, 2.00], p=0.045, random intercepts model), but IL-12 was no longer significantly different (p=0.088).