It's impossible to take seriously people who think anybody taking prudent precautions during a pandemic is "terrified." Such people sound like little boys egging each other on to do dumb things to prove they ain't scared of no ghosts/covid/teacher/whatever. Anybody who is paying attention has read many cases of young, healthy people following exemplary diet and exercise routines who have died or suffered severe long-term side effects from Covid. Get your vaccination, wear your mask and make reasonable accommodations to avoid infecting yourself and others. Eating your veggies and getting exercise are always good things, but perhaps even more important is having empathy for others and avoiding the trap of magical thinking. It appears to me that people who fervently believe the right diet, exercise and supplements will protect them are very much in the grip of superstition.