While the Wuhan virus, which is thought to have originated from a non-human animal host, can now be transmitted from person to person, the vast majority of confirmed cases have resulted in minor symptoms. It’s likely that many patients will assume they merely have a cold or the flu. Elderly and immunocompromised individuals are the ones most at risk of developing serious, or even life-threatening, cases of pneumonia, though one 36-year-old patient in China died with no known pre-existing conditions. As of Friday, Chinese health officials had reported 830 known cases and 26 deaths. Patients have also been reported in Nepal, Macau, Hong Kong, Vietnam, Singapore, Japan, South Korea, Taiwan, and Thailand, with fatalities so far limited to China and primarily clustered around the site of the initial outbreak.