If you test positive for Covid. You will receive a text with the following information from the State of Illinois Surge Center.
All positive cases entered into the State’s data systems associated with a cell phone number will receive an automated text message from IDPH. The initial outgoing text will read:

IDPH COVID: There is important info for you. Call 312-777-1999 or click:…/confirmed-or-possible-covid…
If you have no cell number, they will attempt to call you. If you need a letter for return to work or school, it is vital that you respond to this message.