— Dr. Tom Frieden (@DrFriedenCDC) April 13, 2016
“There is no longer any doubt that Zika causes microcephaly,” CDC Director Dr. Tom Frieden said.
Among the evidence that clinched the case: Signs of the Zika virus, which is spread primarily through mosquito bites and can also be transmitted through sex, have been found in the brain tissue, spinal fluid and amniotic fluid of microcephaly babies.
The CDC and other health agencies have been operating for months on the assumption that Zika causes brain defects, and they have been warning pregnant women to use mosquito repellent, avoid travel to Zika-stricken regions and either abstain from sex or rely on condoms. Those guidelines will not change.