Israel’s BrainStorm (reported here previously) reported promising results of pre-clinical trials for its Nurown treatment for Acute Respiratory Distress Syndrome (ARDS) brought about by Covid-19. The NurOwn cells reduced the cytokine storm and lung damage.

https://ir.brainstorm-cell.com/2020-07-23-BrainStorm-Announces-Groundbreaking-Pre-Clinical-Study-of-NurOwn-R-derived-Exosome-Based-Treatment-for-COVID-19-ARDS