Dr. Anthony Fauci says he would "settle" for a Covid-19 vaccine that's 70% to 75% effective, but that this incomplete protection, coupled with the fact that many Americans say they won't get a coronavirus vaccine, makes it "unlikely" that the US will achieve sufficient levels of immunity to …

A CDC study shows a third of America has reported experiencing signs of anxiety and depression during the coronavirus pandemic. CNN's Sanjay Gupta reports.