CDC confirms Zika virus causes microcephaly
After a careful review of existing evidence, the scientists at the Centers for Disease Control and Prevention (CDC) have concluded that Zika virus is a cause of microcephaly, an underdeveloped brain at birth.
According to their report that was published in the New England Journal of Medicine, the CDC authors came to their conclusion through the increasing evidence from a number of recently published studies and a careful evaluation using established scientific criteria.
“This study marks a turning point in the Zika outbreak. It is now clear that the virus causes microcephaly. We are also launching further studies to determine whether children who have microcephaly born to mothers infected by the Zika virus is the tip of the iceberg of what we could see in damaging effects on the brain and other developmental problems,” said Tom Frieden, M.D., M.P.H., director of the CDC. “We’ve now confirmed what mounting evidence has suggested, affirming our early guidance to pregnant women and their partners to take steps to avoid Zika infection and to health care professionals who are talking to patients every day. We are working to do everything possible to protect the American public.”
This finding means that a woman who is infected with Zika during pregnancy has an increased risk of having a baby with these health problems. It does not mean, however, that all women who have Zika virus infection during pregnancy will have babies with problems. As has been seen during the current Zika outbreak, some infected women have delivered babies that appear to be healthy.
Establishing this causal relationship between Zika and fetal brain defects is an important step in driving additional prevention efforts, focusing research activities, and reinforcing the need for direct communication about the risks of Zika. Answering the many remaining questions about the virus will be the focus of ongoing research to help improve prevention efforts, which ultimately may help reduce the effects of Zika virus infection during pregnancy.
At this time, CDC is not changing its current guidance as a result of this finding. Pregnant women should continue to avoid travel to areas where Zika is actively spreading. If a pregnant woman travels to or lives in an area with active Zika virus transmission, she should consult with a healthcare provider and strictly follow steps to prevent mosquito bites and to prevent sexual transmission of Zika virus. Couples who are in areas with active Zika transmission are also encouraged to engage in pregnancy planning and counseling so that they know the risks and the ways to mitigate them.
Source: CDC
