Globally, Vaccine Hesitancy Threatens To Prolong Pandemic

In Most Of The Countries Gallup Surveyed, The Proportion Of People Who Said They Would Be Vaccinated For Covid-19 Was Below 70%. That's The Lowest Percentage Of The Population That Scientists Think Needs To Have Immunity In Order To Stop The Virus From Spreading. Steve Baragona Explains Why Scientists Think Achieving Herd Immunity Is Important.