The N.F.L. and Covid-19: How the League Prepared for the Super Bowl - The New York Times
NFLPA Investigating Concussion Status of Rams QB Matthew Stafford - Sports Illustrated
Matthew Stafford's concussion symptoms improving; Rams don't plan to shut down QB
North State Journal Vol. 7, Issue 50 by North State Journal - Issuu
Lions QB Matthew Stafford glad NFL altered protocols following false-positive COVID-19 result
ISACA Now Blog Global Perspectives & Real-Time Insights
NFL adjusts testing procedures to address false positives - NBC Sports
NFL changes testing protocols after Matthew Stafford debacle
Virus News: NFL Changing Testing Protocol Following Matthew Stafford Gaffe - Bloomberg