A new report from the US Centers for Disease Control and Prevention (CDC) shows relatively low rates of adverse events from the coronavirus disease 2019 (COVID-19) vaccine.
Overall, between Dec. 14 and Jan. 13 there was more than 13.7 million vaccine doses administered and 6994 reports of adverse events following vaccination. Of the adverse events, 6354 (90.8%) were deemed non-serious and 640 (9.2%) were classified as serious.
To monitor vaccine safety and report adverse events, the CDC relies on the Vaccine Adverse Event Reporting System (VAERS), a spontaneous reporting system and v-safe, an active surveillance system.
Source: Centers for Disease Control
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.