A Singaporean woman, who was infected with the novel coronavirus in March when she was pregnant, has given birth to a baby with antibodies against the virus, offering a new clue as to whether the infection can be transferred from mother to child.

The Straits Times newspaper reported on Sunday that the baby was born this month without COVID-19 but with the virus antibodies.

“My doctor suspects I have transferred my COVID-19 antibodies to him during my pregnancy,” Celine Ng-Chan told the paper.

Ng-Chan had been mildly ill from the disease and was discharged from hospital after two-and-a-half weeks, the Straits Times said.

The World Health Organization says it is not yet known whether a pregnant woman with COVID-19 can pass the virus to her fetus or baby during pregnancy or delivery.