Actually quite rarely. I have cancer at the moment, so am immunocompromised, but I actually can’t think of the last time I had a cold. Last winter maybe?
Dd has COVID at the moment (confirmed because she gets a really unusual symptom when she gets it and I was like, hmm, and dug a test out of the back of the cupboard to test my theory about whether this symptom always indicates COVID or not). Dh about to go down with COVID any second and is flapping around about it. I have maybe just a slightly more runny nose, but feel absolutely fine.
But apart from the whole being immunocompromised from treatment thing, I take very good care of myself. I eat well, I take huge doses of vitamin C and zinc as soon as anyone around me gets a little sniffle, I don’t drink, don’t smoke, I go to bed early and get a good 8-9 hours of sleep a night, I’ve eliminated a lot of chronic stress (which I used to have a lot of!), minus the unavoidable cancer bit.
Dh, on the other hand, is constantly ill. He eats okay, but he drinks, even when he’s ill 🙄, doesn’t take any vitamins, is constantly stressing and up at 10pm returning emails that could wait til the morning, or wakes up and literally first thing when he opens his eyes, bam, on email stressing about some work thing, stressing about how to phrase some sentence in an email, stressing about how BIL is upset with his ex 🤷🏻♀️ Also never, ever, ever takes a sick day. No matter how sick. So it just steam rolls. He thinks only weaklings take a day off. Needless to say, he feels like shit most of the winter and is stressed about productivity.
Look after yourself, eat well, no alcohol or smoking, sleep. Vitamin C and zinc as soon as you think you might get ill. Rest if you do.