COVID Delta Variant

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Overestimating Population Immunity Contributed to COVID Delta Variant Surge in U.S.

COVID Delta Variant Spread Driven by Combination of Immune Escape and Increased Infectivity

New Research Explains Why Vaccinated People at Low Risk During COVID Delta Variant Surge

As COVID Delta Variant Infections Surge, More Americans Favor Vaccine Mandates

Worried About the COVID Delta Variant? Experts Explain Risk of Breakthrough Infections to the Vaccinated

Why Is the COVID Delta Variant Such a Worry? It’s More Infectious, Can Cause Severe Disease, and Challenges Our Vaccines