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 Persistent immune activation and MS explosion #diseaseprevention April 13, 2026 Cicada COVID Variant Spreading in U.S. | What Doctors Want You to Know Now April 12, 2026 New COVID Variant Affecting Kids April 7, 2026 What to know about ‘Cicada,’ the new COVID-19 variant #shorts April 6, 2026 New ‘Cicada’ COVID variant detected as experts urge caution April 4, 2026 New COVID variant spreading April 2, 2026