I'm glad someone has looked into but it doesn't confirm or deny much. They were -measuring mortality- against those already infected and those "instituionalized

I'm glad someone has looked into but it doesn't confirm or deny much. They were -measuring mortality- against those already infected and those "instituionalized but asymptomatic". It doesn't seem to say anything about making symptoms milder for those that contracted covid-19 after taking supplements or for those who have already contracted, which is what I think OP was suggesting.