Early research coming out of China indicates that high dose vitamin C may help lessen the severity of COVID-19 infections.

Here’s a link to learn more: https://thevaccinereaction.org/2020/03/high-doses-of-vitamin-c-used-to-prevent-and-treat-coronavirus-infections-in-china/ .

Note that they administer vitamin C via IV in the study mentioned. If taken orally, I would highly recommend NOT using ascorbic acid, but instead use a fully buffered mineral ascorbate, such as C Aspa Scorb to minimize negative gastrointestinal effects and to achieve a sufficiently high dosing.