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This is Scientific American's 60-second science. I'm Christine Herman. Zika virus infection during pregnancy has been linked to the abnormal brain development called

microcephaly.

Now, a study finds more evidence for the connection.

Researchers at the CDC in the U.S. and the National Health Institute in Colombia found that

the number of babies born with microcephaly in Colombia increased more than fourfold during a nine-and-half-month span in 2016,

compared with the same span in 2015.

And the peak of Zika virus outbreak in pregnant women was followed approximately six months later

with a peak of microcephaly reported in the country.

Margaret Honane, chief of the birth defects branch at the CDC and a senior author of the study.

She says the finding is compelling evidence that the highest risk period for Zika virus infection

is sometime in the first half of pregnancy.

So this both adds to the evidence and helps confirm that any country experiencing a large

Zika virus outbreak should anticipate a large increase in microcephaly.

This is not unique to one geographic location, such as Brazil.

What we're seeing in Colombia is very similar to what was reported in Brazil.

The study was in the CDC's mortality and morbidity weekly report.

Honane says growing evidence now exists for an association between the virus and other defects

...