Table 1.

Dataset sampling frame by topic, date, keywords, and outputs

Topic	Dates covered	Keywords	Number of articles
Travel Quarantine Isolation	March 5th- March 31st	[“Travel”] and [“quarantine” or “isolation”] and [“Covid-19” or “Covid19” or “coronavirus”]	222 (19%)
Epidemiological models	April 1st- April 30th	[“Model*” or “modelling” or “projection*”] and [“Covid-19” or “Covid19” or “coronavirus”]	148 (13%)
Testing	May 5th- May 25th	[“Test*”] and [“Covid-19” or “Covid19” or “coronavirus”]	106 (9%)
Face masks	March 1 - July 14th	[“Mask*” or “face mask”] and [“Covid-19” or “Covid19” or “coronavirus”]	374 (33%)
Physical distancing	March 20th – April 4th	[“Distancing” or “social distance” or “physical distance”] and [“Covid-19” or “Covid19” or “coronavirus”]	255 (22%)
Airborne transmission	May 1st – July 15th	[“indoor transmission” or “aerosol*” or “airborne” or “microdroplet*”] and [“Covid-19” or “Covid19” or “coronavirus”]	38 (3%)