Social technologies to contain the Zika virus:

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Microcephaly is defined by a smaller-than-expected head size for age and gender, which can be congenital or acquired. Disproportionate microcephaly occurs when brain growth lags behind overall body development, while severe cases are marked by head circumference below -3 standard deviations. Various factors contribute to microcephaly, with intrauterine infections like syphilis and Zika virus being significant causes. A notable spike in cases in Brazil in late 2015 raised concerns, linking it to the rapid spread of the Zika virus.