Felipe Sanchez getting a COVID-19 booster shot from pharmacist Patricia Pernal during an event hosted by the Chicago Department of Public Health at the Southwest Senior Center. The latest, bivalent booster vaccine protects against the original SARS-CoV-2 virus and the omicron variants BA.4 and BA.5. But now newer variants are taking hold. (Scott Olson / Getty Images)
COVID-19 is shifting gears once again, which could fuel a new wave of infection this winter.
BA.5 — the dominant COVID-19 variant during the summer and, along with BA.4, the omicron strains that the latest, bivalent vaccines protect against — now makes up less than one-third of new coronavirus cases.
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