A second person is being tested for rabies two days after a woman from Kent was diagnosed with the disease.
The Darent Valley Hospital in Dartford has launched an investigation into claims that she was turned away twice before being finally diagnosed. The woman was bitten by a dog in India - she's now fighting for her life in a London hospital.
The Health Protection Agency now says a second person is being tested for the disease, but can't release details of who the new person being tested is, or where they are from.
Rabies is usually transferred through saliva from the bite of an infected animal, with dogs being the most common transmitter of rabies to humans.
More than 55,000 people are estimated to die from the disease every year, with most cases occurring in developing countries, particularly South and South-East Asia.