POLITICO reporter Rachael Levy broke the story that some hospitals have been asking patients to remove their N95 masks — even though they offer better protection. That story spurred U.S. health officials to consider notifying Americans how to report facilities that they believe endanger them, and the CDC now says on its website that people should “use the most protective form” of masks. Rachael’s reporting changed a national policy in a matter of days — but the question remains why policymakers in the US are behind on mask guidance. Rachael Levy reports.

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