Handling the coronavirus crisis

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On September 20, the CDC also updated its guidance to say that the “main way” the virus spreads is through droplets or small particles, “like aerosols.” Air quality scientists and engineers who have been calling for such a change celebrated. With recognition of this mode of transmission, the scientists hope, communities can think more about the ventilation of indoor spaces and perhaps engineer solutions to make these spaces safer.

The CDC also noted the “growing evidence” these droplets and airborne particles can travel more than 6 feet in the air. (Though, it’s been clear for quite some time that the 6 feet guidance was insufficient to explain all the facets of the risk in catching Covid-19.) But then, on Monday, the CDC retracted its updated guidance, writing “a draft version of proposed changes to these recommendations was posted in error to the agency’s official website.” It was not immediately clear why the update was retracted. But something stinks: As the New York Times and other media outlets have reported, President Trump’s Department of Health and Human Services has been interfering with the CDC’s scientific communications for apparent political reasons.

Is the coronavirus airborne? The latest CDC guidance, explained. - Vox

• And yet another CDC guideline mysteriously retracted..