Is it too late to take vitamin C to help ward off Covid? ?

Ok so if someone cough on me by accident, is it too late to take vitamin C to help built that stronger immunity system to help ward off Covid? 

sunshine_mel2021-03-09T21:32:38Z

Taking a vitamin post-exposure won't make any difference whatsoever. 
Vitamins don't cure / prevent COVID either though.

jean2021-02-23T00:28:30Z

it may help your immune system

Madeline2021-02-22T23:27:55Z

It's probably not to late, maybe add some vitamin D also