The testing data represents data reported to IDPH through Electronic Laboratory Reporting (ELR) only.  It is based on the date results are reported into the ELR. It excludes testing data that are received from sites that have not implemented ELR. This excludes 3-5% of test data. Weekly test positivity = [County positive tests for 7 days] / [County total tests for same 7 days] x 100 Minimal:  Test positivity is <5% Moderate: Test positivity is >5% and <8% Substantial