Since time immemorial, people have known that the cold weather brings more frequent colds, and now, (as of 2015) humanity finally knows why.
It's because your nose is cold!
A colder nasal cavity simpy renders you're immune system less effective in the main place viruses lay dormant in the body, the colder temperature means slower chemical reactions. https://news.yale.edu/…/cold-virus-replicates-better-cooler…
So now, along with making sure you're getting plenty of sleep, Vit C and Zinc, you can add the nose warmer to your cold prevention and amelioration regime ;)
(picture from www.nosewarmer.com)
Foods to boost your immune system
*Vitamin B6
Fruit (not citrus), organ meats, starchy vegetables (potatoes with skin left on)
*Vitamin C
Tomatoes, citrus fruit, red capsicum, broccoli, kiwi fruit
*Vitamin E
Sunflower seeds and oil, healthy oils, almonds, peanut butter
*Magnesium
Whole grains, legumes, nuts, seeds, leafy greens
*Zinc
Oysters, beef, crab, poultry, beans, nuts, pumpkin seeds, wholegrains