1.
Working Paper Series National Bureau of Economic Research
; 54(47), 2021.
Article
in English
| GIM | ID: covidwho-1771027
ABSTRACT
Background: A growing body of scientific evidence suggests that face masks can slow the spread of COVID-19 and save lives, but mask usage remains low across many parts of the world, and strategies to increase mask usage remain untested and unclear.
2.
Science
; : eabi9069, 2021.
Article
in English
| PubMed | ID: covidwho-1543310
ABSTRACT
[Figure: see text].