My research indicates the lack of enough Vit D-3 and zinc is killing most of them.
Vit C helps a lot too, and it seems D-3, Zinc and C are all part of the immune system control and creation of the long term antibodies battle that actually kills COVID19 (in part using zinc?) that was missed until recently.
The Immune suppressants can stop a cytokine storm, but the next question is can the body make long term antibodies fast enough and enough quantities before lung cell damage causes low blood oxygen leading to Protein B going ape shit and cause blood clots (2018 NIH study I shared about 6 weeks ago) that cause the strokes that are killing the people.