Usually it's another one of those things that don't survive a fact-check.
This is from one of Australia's reputable teaching hospitals:
https://www.abc.net.au/news/2020-12-03/mega-dose-of-vitamin-c-treats-sepsis-florey-institute-austin/12939202
"Doctors at Melbourne's Austin Health have now begun a randomised controlled trial, giving some patients with septic shock a megadose of vitamin C and some a placebo."
This trial may be useful for septic shock, but to assess its effect on Covid-19 ICU patients it will have to be done outside Australia. We don't have any of them.
This is from one of Australia's reputable teaching hospitals:
https://www.abc.net.au/news/2020-12-03/mega-dose-of-vitamin-c-treats-sepsis-florey-institute-austin/12939202
"Doctors at Melbourne's Austin Health have now begun a randomised controlled trial, giving some patients with septic shock a megadose of vitamin C and some a placebo."
This trial may be useful for septic shock, but to assess its effect on Covid-19 ICU patients it will have to be done outside Australia. We don't have any of them.