coronavirus chicago July 12, 2022 12:48 pm

Chicago Has Seen Omicron BA.5, BA.4 Surge Ahead of New York and Europe According to Chicago's Top Doctor

Considered the most contagious COVID-19 subvariants to date, BA.4 and BA.5 have fueled surges in case counts across the country, including in the Midwest, where both have become predominant strains.

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