Doctors said a Brazilian baby with brain damage caused by the Zika virus stayed infected for more than two months after his birth, NBC News reported.
The baby already had brain damage from the virus, which can infect a growing fetus. But the virus continued to actively infect him after he was born, Danielle Oliveira of the University of Sao Paulo and colleagues wrote in a letter to the New England Journal of Medicine.
"When the infant was examined on day 54, he had no obvious illness or evidence of any immunocompromising condition," they wrote. An immune condition might explain a prolonged infection. The baby was developmentally delayed and had cerebral palsy.
This suggests that newborns may still be at risk from the virus while their brains are growing and developing — another unpleasant surprise about the virus.