The Detroit Lions announced Tuesday that star quarterback Matthew Stafford has been activated off the reserve/COVID-19 list.
Matthew Stafford cleared to return after false-positive COVID-19 test
In a statement released by the Lions, they shared that Stafford was forced onto the reserve/COVID-19 list because of a false-positive test. Following that test result, Stafford tested negative on his next three tests.
So, in short, Stafford never had COVID-19.