COVID vaccines and relative effectiveness: Yahoo News Explains

On Thursday, Johnson & Johnson submitted it’s COVID-19 vaccine for Emergency Use Authorization by the U.S. Food and Drug Administration. If greenlit by the Food and Drug Administration, it could be the nation’s third COVID vaccine producer, joining Pfizer and Moderna. Johnson & Johnson said last week that its one-dose vaccine has an overall 66% efficacy rate, not as high as Pfizer or Moderna’s two-dose vaccines with nearly 95% efficacy. Yahoo News Medical Contributor Dr. Kavita Patel explains why all of the top coronavirus vaccine manufacturers with clinical trials are a success across the board.