That's a condition in which the brain does not develop properly resulting in a smaller than normal head.  In recent years, it has been said that unusual numbers of microcephaly have been caused by the Zika virus, but this report from Natural News indicates that it could be related to the DTap vaccine. Other conditions associated with this vaccine include brain damage in young children, heart problems, meningitis, and epilepsy. -GEG

The adverse event-deniers who insist that vaccines are 100 percent safe and never cause any problems in children clearly missed a little-known 1991 study published by the United States Government. This paper reveals a clear link between the popular Tdap vaccine for tetanus, diphtheria, and pertussis (whooping cough), and microcephaly, a neurological birth defect that in recent years authorities have been erroneously blaming on the Zika virus.