Stat: 93%—93% of new COVID-19 cases were caused by the delta variant in the United States by the end of July 2021. Story: The battle against the COVID-19 virus seemed almost won, but the delta variant is now responsible for a new surge of cases. In this episode, we turn again to infectious disease physician Dr. Rebecca Wurtz to learn more about this new variant and what it means for both vaccinated and unvaccinated populations.

After the Fact

The Facts Behind the COVID-19 Delta Variant

After the Fact is a podcast from The Pew Charitable Trusts that brings you data and analysis on the issues that matter to you—from our environment and the sciences, to larger economic trends and public health. Experts from Pew and other special guests discuss the numbers and trends shaping some of society’s biggest challenges with host Dan LeDuc, then go behind the facts with nonpartisan analysis and stories.

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After the Fact