By Rocio LopezMEXICO CITY (Reuters) - Mexican health authorities are trying to understand how a set of newborn triplets became infected with the novel coronavirus even though neither one of their parents tested positive for the virus.
Health authorities called the case "unheard of."The triplets, a girl and two boys, were tested four hours after being born at 7-1/2 months last week in the central state San Luis Potosi, health authorities said.
Initially, health authorities said the mother was believed to be an asymptomatic carrier of the virus. But her tests later showed that neither she nor the father were infected.