Sleep more! There was some study that found that reducing your sleep from 9 hours to 5.5 hours reduces your immune system by 1/2. I don’t have a citation handy

Sleep more! There was some study that found that reducing your sleep from 9 hours to 5.5 hours reduces your immune system by 1/2. I don’t have a citation handy but whenever I got sick in college, it was usually during final exam weeks when I had to pull late nighters. Sleeping is the single best thing you can do for your immune system and your immune system is your last line of defense.