Some controversy arose a few years ago over the possibility that the DTP (diphtheria-tetanus-pertussis) vaccine might trigger epilepsy or other neurologic diseases. Some experts suggest that children who have neurologic events following their DTP shot already have a preexisting impairment such as epilepsy, which is revealed, but not caused by, the vaccine. Children with existing epilepsy may be at risk for seizures 2 or 3 days after the vaccination. Infants with suspected neurologic problems may... read more