There are no approved vaccines or treatments for Sudan virus disease, which has a 40–70% fatality rate. To curb the ongoing outbreak, Uganda has deployed—under a clinical trial setting—a vaccine candidate developed by the International AIDS Vaccine Initiative (IAVI).

The agency said although no cases have been reported in the U.S., it was issuing an advisory through its health alert network to raise awareness. On January 29, a male nurse working in Uganda's capital,