Since COVID-19 is about having a strong immune system, I am going to share with you 3 keys to building a strong immune system in no particular order:
1. Get Plenty of Sleep, sleep is vital to a strong immune system. For most people thats anywhere from 6-9 hours of sleep with 8 hours being a sweet spot for most people.
2. They way you eat. Stick with a low sugar diet, high in micro-nutrients (your vitamins specifically C and D) Look for veggies like broccoli and carrots and kale. And Fruits like oranges and apples and pomegranates.
3. Exercise, I can tell you to lift weights or go do sprints but even a basic 30 min at your pace walk is excellent 3 times a week.
I hope this helps, my prayer is for you to stay healthy!