Table 1.

Question classification by topic and website categorization by source.

Variable			Description
Question classification by topic
	Clinical signs and symptoms	Properties of SARS-CoV-2, signs and symptoms of COVID-19, prognosis, risk factors, severity, testing Example: can you have the coronavirus disease without a fever?
	Treatment	Treatment strategies for COVID-19, including antiretrovirals and vaccines; also includes inquiries for unsupported treatments Example: Can antibiotics treat the coronavirus disease?
	Transmission	Inquiries regarding specific routes of transmission for SARS-CoV-2 Example: Can coronavirus spread through mosquito bite?
	Cleaning methods	Inquiries regarding specific methods of sanitation to limit spread of COVID-19 Example: Can ultraviolet light kill the coronavirus disease?
	Activity modification	Questions regarding effectiveness of various activities or lifestyle changes in preventing COVID-19 Example: Can I walk my dog during quarantine?
	Policy	Questions about local or national policy changes enacted in response to COVID-19; includes questions about economic support Example: Does everyone get a stimulus check?
Website categorization by source
	World Health Organization (WHO)	Website maintained by the WHO and hosted on the who.int domain Example: COVID-19 Situation Report (who.int)
	Centers for Disease Control and Prevention (CDC)	Website maintained by the United States CDC and hosted on the cdc.gov domain Example: Travelers’ health (nc.cdc.gov/travel)
	Government	Websites maintained by national, state, or local governmental organizations other than the WHO or CDC Example: New York State Governor’s Office (governor.ny.gov)
	Academic	Websites maintained by an institution with a clear academic mandate, including universities, academic medical centers, and academic societies Example: ClevelandClinic.org, MayoClinic.org
	News	Websites published by local, national, or international news media organizations Example: USAToday.com
	Other media	Websites maintained by organizations not defined in the categories above Example: Wikipedia.org