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How might Americans' experience with inflation translate into votes? Putin raises the stakes as he watches Russia practice for nuclear war. Hospitals near capacity with severe virus patients.
SARS-CoV-2 is evolving
SARS-CoV-2 is evolving "rapidly," spawning one new variant after another. But omicron continues to dominate, raising new questions about how evolution of the virus is headed.
Rob Stein is a correspondent and senior editor on NPR's science desk.
While infections, hospitalizations, and deaths from Covid-19 have been steadily declining in the United States in recent months, experts warn that rising cases in Europe may be "a harbinger for what's about to happen in the United States," Rob Stein writes for NPR's "Shots."