The World Health Organization has released data showing that at least 431 people have been diagnosed with an unknown illness in two remote villages in the Democratic Republic of the Congo.

At least 50 people have died from a mystery illness discovered in three children who ate a dead bat, in the Democratic Republic of the Congo (DRC). Newsweek has contacted the World Health Organization (WHO) and the Centers for Disease Control and Prevention (CDC),

Only weeks after President Donald Trump forced the United States to exit the World Health Organization, experts say that millions of lives are already at risk, and WHO officials are now sounding the alarm about an “unknown” disease in central Africa that can kill within days.

The World Health Organization warns an outbreak of an unidentified illness in the Democratic Republic of the Congo has spread to more than 419 cases and caused at least 53 deaths. The disease causes symptoms consistent with hemorrhagic fever,

Gutting USAID is already having a devastating impact around the world. In the Democratic Republic of Congo, teams that would normally be racing to identify a fatal sickness are gone.

The World Health Organization speculated that a mass poisoning event was behind the deaths of 60 people. But African experts suspect a more mundane cause.

The disease, which has infected more than 400 people and killed 53 within a few weeks, “poses a significant public health threat,” the World Health Organization said.

The outbreak began in January, with 419 cases recorded so far, and comes after another mystery illness killed 143 in December

World Health Organization officials said the outbreak appeared to originate from a village where three children died after reportedly eating a bat carcass.