I've been telling my friends to take Vitamin D3. As is expected from my friends, they want some research to support my suggestion. Here's an open access article
"Vitamin D alleviates lipopolysaccharide‑induced acute lung injury via regulation of the renin‑angiotensin system" https://www.spandidos-publications.com/10.3892/mmr.2017.7546 #calcitriol #cholecalciferol #VitaminD #acutelunginjury