An influential scientific panel opened a new front in the campaign against the coronavirus, recommending booster shots of the Pfizer-BioNTech Covid vaccine for a wide range of Americans, including tens of millions of older people. But the experts declined to endorse additional doses for health care workers, teachers and others who might have higher exposure on the job.
The decisions were made by the C.D.C. panel, the Advisory Committee on Immunization Practices, in a series of votes, during which scientists agonized over their choices. The recommendations revealed deep divisions among federal regulators and outside advisers about how to contain the virus nearly two years into the pandemic.
Source: New York Times
Association between COVID-19 outcomes and mask mandates, adherence, and attitudes
Using an event study design, authors estimate the treatment effect of the introduction of mask mandates (shown on the vertical red line) on Z-scored population-normalized COVID-19 daily new confirmed cases, daily new hospitalization admissions proportion, and deaths across all 50 states and D.C. over the time period between February 1 and September 27, 2020.
Source: Dhaval Adjodah, Karthik Dinakar, Matteo Chinazzi, Samuel P. Fraiberger, Alex Pentland, Samantha Bates, Kyle Staller, Alex Vespignani, Deepak L. Bhatt. Association between COVID-19 Outcomes and Mask Mandates, Adherence, and Attitudes.