Covid-19 vaccine might not get us the herd immunity if too many people refuse to get it, Fauci says

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 quell the outbreak.