IE 11 is not supported. For an optimal experience visit our site on another browser.

Laurie Garrett: Even with a vaccine, wear a mask and keep social distance

04:54

Laurie Garrett, Pulitzer Prize-winning reporter covering global pandemics, tells Lawrence O'Donnell that if people stop following Covid-19 health guidelines, “We are going to see a horrible explosion in cases and deaths long before the vaccine reaches mass distribution.”