On Friday's broadcast of CBS' "Late Show," White House Chief Medical Adviser Dr. Anthony Fauci stated that people who have been vaccinated against the coronavirus can transmit the virus, but there's recent data that says the amount of virus that people who have been vaccinated have is "extremely low. And I think a couple of months from now, I might modify that statement and say it would be extremely unusual that you would transmit it. But right now, just to be careful, wear a mask."