Mayo Clinic Q&A: COVID-19 Vaccine Trials Update

While the number of COVID-19 cases continues to surge there is positive news on the vaccine front. In early clinical trial data two vaccines have now shown at least 90% effectiveness in reducing the risk of infection from the virus that causes COVID-19. While more time and research is needed to understand how long the immunity from a vaccine lasts experts believe a vaccine could be approved for emergency use authorization before the end of the year. (Published 11/17/2020)