It is obvious the geographic and culture differences have an impact of the outcome.

A lot of these facts will be hard to swallow for the politicians, especially those who took decisions on beliefs not science. The aftermath needs a lot of closer looks to the health care overall situation. When experts sit on their own knowledge not knowing what others have learned, the cooperation dissapear. This is what has been exposed so cruely during this pandemic.

If boosting nitric oxcid levels in the blood is essential, then a closer look should be taken on the essential amino acid L-arginin. Our body produces this amino acid, but the production lowers by age. Also other conditions like kidney damage can reduce the natural production. Old people have low levels and then more vulnerable as the benefits of “high” levels are obvious.

Most healthy people do not need to supplement with arginine because it is a component of all protein-containing foods and can be synthesized in the body from glutamine via citrulline.

https://en.wikipedia.org/wiki/Arginine

When this pandemic comes to an end I am sure the research will uncover that a healthy body is the best protection to fight the virus.