My reading of the virus facts to date is that simply good nutrition trumps supplements, which have no proven benefit.
Sorry my friend, but I disagree, with the material that you have read.
The medical profession used to use leaches for blood letting, later they scoffed at Dr. Linus Pauling for suggesting that Vitamin C helped prevent a cold. Not so much anymore.
I know that it is anecdotal, but although I generally eat a healthy diet, I have found that if I regularly supplement with a Multi vitamin/mineral, and extra Vitamin C, I won't get a cold all season. There are years, that I am careless, and don't take a supplement for months at a time. I might get two or three colds that season. Well, yeah... that doesn't happen anymore. If I have been bad, at the first sign of a cold, I double up, and then become regular again.
IMO during this outbreak, it is important to stay hydrated, take supplements, get rest, maintain a healthy attitude (stay in touch with family and friends, on the phone, face-time etc), stay at home, if you go out... keep your distance! wash your hands, and face, don't touch your face.
You might also consider, that if you go food shopping, disinfect anything that you bring in, take a shower and change your clothes, and wash those clothes. If you can't wash them, plastic bag them for a few days.
I saw a video yesterday of a doctor showing how to "sterile technique" your food when you bring it home. It really makes sense. Imagine that everything that you bring in has sparkles on them and you want to wash them off before you store them.