Here's how sane people deal with the fact that EVERY WINTER people get sick:

1. STAY WARM. We think we can tolerate a few minutes of cold temperatures, but our bodies do not like that.
2. STAY HYDRATED! We don't drink as much when it is cold vs. when it is hot. Remember to drink plenty of fluids.
3. GET REST. Sleep is critical and vital. Just because the sun sets early is no excuse to stay up late.
4. EXERCISE. If you're locked indoors because there is snow outside, remember you still need to exercise!
5. VITAMIN D3. If you're not getting your 20 minutes of sun every day, then you need to supplement with Vitamin D3. It's ok to take too much, but it's better to be consistent with your dosage.

And remember what grandma would give you when you got the inevitable cold or flu? CHICKEN SOUP. It's easy to make your own. Buy a whole chicken, roast it, take all the meat off the bones and boil the bones with the leftover bits. Add onion, celery, carrots. Simmer it for the better part of the day. Strain it -- that's your liquid gold, chicken stock. You can freeze it in gallon ziplock bags. Chicken soup is as easy as bring that up to heat, adding some noodles, maybe some veggies or tiny bits of meat. Season to taste (usually salt and pepper is sufficient) and there is your cure for covid.