evidence: Yes. Adults who have not previously gotten the Tdap vaccine should receive a single dose. Pregnant women should get the Tdap vaccine between 27 and 36 weeks’ gestation during each pregnancy because pertussis can be fatal to young infants. Although any time during this window is fine, public health personnel suggest earlier rather than later during the window for maximum protection for the baby. [...] The authors examined the relationship between pertussis and other vaccines and neurological problems over a seven-year period. All children reported to have serious or unusual vaccine reactions, regardless of severity, had records investigated and were physically examined by an area health authority medical officer four weeks after the original report; and all children, except for those with mild symptoms, had a developmental examination six months after the report. In a group of hundreds of thousands of children and more than 400,000 DTP immunizations, 20 reports of convulsions within three weeks of DTP were reported and three-quarters of the reports were febrile seizures within 48 hours of immunization; all children were developmentally normal on follow-up. Twelve neurological disorders were reported to have occurred within eight weeks of DTP receipt; 11 of which had either infantile spasms, infectious etiology, or epilepsy, none of which were linked to DTP. The authors concluded that their study does not support the claim that DTP produces a syndrome characterized by a previously healthy child who presents with continuous screaming, collapse, convulsion and arrested mental development.