Researchers are now testing the first vaccine for the new coronavirus, the National Institutes of Health announced March 16.
The study will enroll 45 healthy volunteers in Seattle, one of the first U.S. epicenters of COVID-19, as the respiratory illness caused by the virus is known.
The coronavirus continues to spread rapidly. As of March 19, there were more than 227,000 confirmed cases worldwide, more than 9,000 cases in the United States, over 800 cases in California, and just over 400 in the