I read that in studies, including a meta-study showing no difference in mortality rate.

I suppose it's not strictly "useless" as it apparently can reduce time spent in ICU in patients who would get better anyway, but in my view to call it useful it should affect outcomes.

I'm also betraying my frustration with pharma's hold on the medical system and minds, where common sense interventions like correcting deficiencies in vitamin D, zinc etc. are seemingly ignored. Even the media is in on it. It's really an awful situation.