How Many People Need Vaccines to Reach Herd Immunity?
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Dinosaur fossil of Tyrannosaurus Rex
Samantha Estes prepares garments to be photographed at the ThredUp sorting facility
Letters from schoolchildren
Refugees attend a basic English lesson on the outskirts of Kuala Lumpur, Malaysia
Delmonico’s Restaurant in New York City in an undated photo
Succulent plants growing in a home
Man wearing protective face covering
Temporary tents erected outside of a restaurant