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- ABC News
- April 12, 2022
Omicron subvariant fuels COVID-19 surge across US
Philadelphia has become the first major U.S. city to reinstate an indoor mask mandate in response to rapidly rising COVID-19 cases fueled by the BA-2 variant.
3:00
Philadelphia has become the first major U.S. city to reinstate an indoor mask mandate in response to rapidly rising COVID-19 cases fueled by the BA-2 variant.