Philadelphia’s indoor mask mandate is coming back, the city health department announced Monday.

The city will move to Level 2: Mask Precautions due to rising COVID-19 cases in Philadelphia in the past weeks.

The mandate announced won’t go into effect until April 18.

The city moves to the 2nd of 4 levels in a system established by The Philadelphia Department of Public Health.

Philadelphia becomes the first major U.S. city to reimpose an indoor mask mandate.

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