The basics: What we know — and don’t know — about the virus spreading in China and beyond
It’s been only three weeks since Chinese authorities alerted the World Health Organization that it had an outbreak of unusual pneumonia cases. An astonishing amount of information has been learned in the days since about the outbreak, caused by a new virus that jumped from animals into people. But a frustrating amount of information remains still beyond our grasp.
Scientists and public health officials in China and beyond are scrambling to try to learn more about the virus, which has already spread out from the Chinese city of Wuhan, where the outbreak appears to have started, to other parts of China and several other countries, including the United States.
