In Season 2 of "The Road to a Vaccine," host Lisa Ling interviews scientists, global health leaders and other experts on the COVID-19 front lines to reveal the latest medical advances and collaborations to create a coronavirus vaccine—and hopefully a return to a world without the pandemic.

As we head into fall, how is COVID-19 testing going? Lisa Ling speaks to experts, including Ann Lee, co-founder, with actor Sean Penn, of the nonprofit CORE, to get the latest updates on testing efforts and contact tracing across America.

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