A third surge in COVID-19 cases in the U.S., with many hospital systems warning of strained capacity, underscores how much hopes for a return to normalcy could hinge on a safe and effective vaccine.
More than 40 vaccines are in clinical testing worldwide, with four in late-stage studies in the U.S. Should data from the trials of those four prove positive, their developers plan to seek an emergency use authorization form the FDA. Results from both Pfizer and Moderna are likely to come next month.
