After the Zika virus turned up in Brazil two years ago, hundreds of babies were born with severe brain damage and underdeveloped skulls — a birth defect known as microcephaly.
The reports of microcephaly terrified pregnant women and prompted Brazil to declare a national health emergency.
But researchers in the central Brazilian state of Sao Paulo now say that Zika may be more likely to produce a miscarriage than a baby with a smaller than normal head.
Dr. Benedito Fonseca, a professor of internal medicine at the School of Medicine of Ribeirão Preto in Sao Paulo, says that back in 2015, people worried in part because Zika was a mysterious disease that had never been detected before in Brazil. "In that time every pregnant woman wanted to know what was going to happen with their pregnancy," he says.
Little was known about the virus and the effects it could have on a developing fetus — or even what the relationship was between Zika and microcephaly.