On Mar 23, 2020, Risk Group discusses whether Vitamin C can play a preventive and therapeutic role in the Coronavirus, COVID 19 crisis with Dr. Richard Cheng, M.D., Ph.D. camera phoneCoronaviruscovidCOVID-19COVID19freeimmune systemIMMUNITYPREVENTRiskRoundupsharingtreatuploadvideovideo phoneVITAMINvitamin CoronavirusvlogWebcastYouTubeRelated Posts Did Your Allergies Get Worse After COVID? Watch This February 26, 2026 There may be a universal vaccine in the future. #science #vaccine #doctor February 21, 2026 The Immune Shift No One Explains After COVID February 19, 2026 Doctor Reacts: Covid masks in 2026?! February 19, 2026 ‘Particularly capricious’: Doctor weighs in on undermining of mRNA technology February 15, 2026 COVID’s Hidden Impact: Immune System Triggers Explained #shorts January 30, 2026