CMV, mycoplasma, and cultured to enrich for MSCs. WJ‐MSCs will be counted and suspended in 25 ml of saline solution containing 0.5% human serum albumin, and will be given to patient intravenously I Primary (3 weeks): Clinical outcome, CT Scan, RT‐PCR results Secondary (8 weeks): RT‐PCR results NCT04313322/Recruiting, Mar16‐Sep30 2020 Myocardial damage in COVID‐19 Non Ch