1. World Health Organization Rolling Updates on Coronavirus Disease (COVID-19)
https://www.who.int/emergencies/diseases/novel-coronavirus-2019/events-as-they-happen
2. Fully vaccinated people can stop wearing masks indoors and outdoors, CDC says
https://www.npr.org/2021/05/13/996582891/fully-vaccinated-people-can-stop-wearing-masks-indoors-and-outdoors-cdc-says
3. CDC’s mask guidance spurs confusion and criticism, as well as celebration
https://www.washingtonpost.com/health/2021/05/14/cdc-mask-update-decision-confusion
4. What the science says about lifting mask mandates
5. The CDC’s abrupt change to mask guidelines puts people at risk
https://time.com/6049612/cdc-mask-guidance-mistake