There's finally a light at the end of the Covid-19 tunnel, according to Dr. Anthony Fauci ⁠— but only if the "overwhelming majority of people" get vaccinated. For Fauci, the White House's chief medical advisor, that means more Americans will feel comfortable getting vaccinated ⁠— and the U.S. could have enough control over Covid to return to some degree of normalcy by spring 2022. It's not yet clear what percentage of the population needs to be vaccinated in order to achieve a comfortable level of immunity, Fauci told CNN.