This website tells how throught 2020 when Covid-19 was it's peak "many websites and social media posts were claiming how high doses of vitamin C could cure and/or be an effective treatment for COVID-19". Many websites would talk about how Vitamin Chelps support the immune system which is a fact. Also Harvard Health Publishing stated that it helpes reduce symptoms for the common cold but it if you start taking it beforehand. There isn't anything proving for or against that Vitamin C can cure. This was all mainly spread through social media and by influencers telling the younger easily influenced generation that it could cure. The conclusion of this is that it was fake news and it was never proven that Vitamin C can actually cure COVID-19.