U.S. coronavirus cases rise by nearly 50,000 in biggest one-day spike of pandemic

U.S. coronavirus cases rise by nearly 50,000 in biggest one-day spike of pandemic: The record follows a warning by the government's top infectious diseases expert that the number could soon double to 100,000 cases a day if Americans do not come together to take steps necessary to halt the virus' resurgent spread, such as wearing masks when unable to practice social distancing