Dr. Anthony Fauci had previously said it could take up to 90% of the US population to get vaccinated to reach herd immunity against the coronavirus.<br />But on Sunday, he clarified his 'guesstimate' downwards to 70 to 85% of the population.<br />Business Insider reports Fauci admitted on CNN's 'State of the Union' that 'we all have to be honest and humble, nobody really knows for sure.'<br />This month, the US Food and Drug Administration authorized both Moderna and Pfizer and BioNTech's coronavirus vaccine for emergency use.<br />Healthcare professionals and frontline workers across the country have been getting vaccinations since the vaccine rollouts.
