my food today is pretty well my normal food and has been similar for over 30 years. I eat from 7 to 12 veg a day but cannot possibly eat that amount as normal steamed or raw veg, so I make soups and I juice some veg. I am not a saint with my food by any means but I am saintly with my veg. My juice later will be made for 2 days, I have a vertical slow juicer and have a stack of kale, some lemon, some celery and some carrots today.
re exercise, too much exercise can damage the immune system, a little is good. Never exercise while having a virus of any type.
I think if people knew the basics of what is actually the immune system then they would not worry about younger people, especially children. The immune system is very complicated and we can support it but we cannot make a new immune system, like we had when we were children