I started studying vitamin C about 15 years ago. It has been my experience personally, with my family, and clinically, that it is the most important nutrient to assure adequacy of during acute illness, and doing so has shown the most profound results I have seen in working with people in such situations. And you don't have to be septic to be potentially deficient in it.
What brand or type do you use? Liposomal?
I don't have a preferred brand. Here is a great resource http://orthomolecular.org/resources/omns/v14n12.shtml
Here is an fascinating discussion on use of different types: https://wholefoodsmagazine.com/columns/vitamin-connection/the-science-of-vitamin-c-research-on-optimizing-blood-and-cellular-levels/