How it works
Intravenous Vitamin C therapy pumps vitam C directly into your bloodstream, boosting your immune system and helping you fight off the flu. Since the flu is a virus, boosting your immune system and resting are really the only things you CAN do (as far as I know). Whenever I have done this, it has made me feel significantly better within two or three hours after finishing the treatment and in most cases I fully recovered in just 2-3 days.
*While I primarily have used Vitamin C IV when fighting the flu, plenty of other people use it when dealing with other ailments. For example, when my father had cancer, he frequently went to get Vitamin C Drips to boost his immune system and ultimately help cure it (he called it C-mo therapy and his insurance even covered it, classifying it as chemotherapy).