School District of Belleville - Illness
https://www.cms4schools.com/news_rss.cfm?detailid=855693&memberid=1028
School District of Belleville - Illnessen-usWhat to do if you are sick or possibly exposed to COVID?
https://publichealthmdc.com/coronavirus/what-to-do-if-you-are-sick-or-possibly-exposed
Isolation and precautions for people with COVID
https://www.cdc.gov/coronavirus/2019-ncov/your-health/isolation.html?CDC_AA_refVal=https%3A%2F%2Fwww.cdc.gov%2Fcoronavirus%2F2019-ncov%2Fyour-health%2Fquarantine-isolation.html