Vitamin C is also an antiviral. It can cure flues and common colds if you take enough.
Even if you think this is "Crazy" there is NO TREATMENT for the flu or Coronavirus. Vitamin C is as safe as water to take and the only side effects at high does orally is the poops. If that happens then you just slow down on the doses.
http://www.orthomolecular.org/resources/omns/v16n04.shtml
If you're nervous take a multivitamin with each meal to prevent infection and vitamin C if you have symptoms.
https://www.brighteon.com/646ad120-775a-4464-a0d1-609be7a0a9dc