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CDC Director: 'Very Aggressive' Contact Tracing Needed For U.S. To Return To Normal

By Rob Stein,

Selena Simmons-Duffin

Published April 10, 2020 at 4:00 AM CDT

Rob Stein

Rob Stein is a correspondent and senior editor on NPR's science desk.

See stories by Rob Stein

Selena Simmons-Duffin

Selena Simmons-Duffin reports on health policy for NPR.

See stories by Selena Simmons-Duffin