"According to the Jerusalem Post, the company Pluristem created a placenta-based cell-therapy that has not only helped patients survive but also improve respiratory parameters to boot. These patients were in dire straights while being tested with organ failures across the board"

https://www.redstate.com/brandon_morse/2020/04/10/fda-moves-israeli-covid-19-treatment-with-100-survival-rate-into-clinical-trials/