Eatright.org has a very straightforward article on how “You may help support your immune system by including these nutrients in your overall eating plan on a regular basis.”
The New York Times has an article (free) about how some supplements people are taking to strengthen their immune system may actually be hurting it.
“Someone asked me if they should do a detox juice cleanse and I told them absolutely not,” said Ms. Koff, who is the chief executive of The Better Nutrition Program, which provides nutrition advice to individuals and corporate wellness programs. “Someone else asked me if they should be doing a fast. I told them anything that’s depleting your body of resources right now is going to increase the risk of you getting sick.”
The Federal Trade Commission has guidelines on how to avoid Coronavirus scams. Here’s a preview – they’re all scams – there is no cure as of now.