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3. Masks and Respirators. Centers for Disease Control and Prevention https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/about-face-coverings.html (2020).
4. Handwashing an effective tool to prevent COVID-19, other diseases. World Health Organization https://www.who.int/southeastasia/news/detail/15-10-2020-handwashing-an-effective-tool-to-prevent-covid-19-other-diseases (2020).
5. Keeping Hands Clean. Centers for Disease Control and Prevention https://www.cdc.gov/hygiene/personal-hygiene/hands.html (2022).