U of I’s Hergenrother talks saliva-based COVID-19 testing Ryan Voyles 4 years ago Timothy Fan, professor of veterinary medicine and Paul Hergenrother, professor of chemistry State officials announced last week the University of Illinois at Urbana-Champaign received emergency federal approval for its potentially “game-changing” COVID-19 saliva tests.To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.