The two top infectious disease experts on the White House coronavirus task force think social distancing measures appear to be helping but reminded Americans they are going to have a significant effect on how many people in the Unites States die. "It's communities that will do this. There's no magic bullet (for Covid-19), there's no magic vaccine or therapy, it's just behaviors," said Dr. Deborah Birx, coordinator of the task force. "Each of our behaviors translating into something that changes the course of this viral pandemic over the next 30 days."