The most mutated variant of the coronavirus yet was found in travelers from Tanzania, prompting scientists to call for greater monitoring in a country that has largely ignored the pandemic.
A report submitted to the World Health Organization and regional bodies shows the strain has 10 more mutations than found on any other version, according to Tulio de Oliveira, director of Krisp, a scientific institute that carries out genetic testing for 10 African nations. Krisp, which discovered a new strain in South Africa last year that propelled a resurgence of infections in the country, found the new variant in travelers arriving in Angola from Tanzania.
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.