The Department of Justice has moved to appeal a ruling that struck down the federal mask mandate on planes, trains and transit systems after a request by the Centers for Disease Control and Prevention.

The CDC said in a statement Wednesday that “at this time an order requiring masking in the indoor transportation corridor remains necessary for the public health,” adding that it has asked the Justice Department to proceed with an appeal.

The Justice Department said that it has filed a notice of appeal “in light of today’s assessment by the CDC” in a statement late Wednesday afternoon.

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