Experts ask to see data behind new policy

July 30, 2021

In the text of the updated masking guidance, the agency merely cited "CDC COVID-19 Response Team, unpublished data, 2021."She said the data comes from outbreak investigations in which researchers compared delta infections among vaccinated and unvaccinated people.But Fauci noted there is not yet clinical data on what the high viral loads mean in terms of disease transmission.Research by Chinese scientists posted online and not yet peer-reviewed describes the stunning ability of the delta variant to replicate in the human body.Most new cases involve the delta variant.