My bad accident in 2017. I used to catch about one cold a year, now I get three or four a year. It's like my immune system is weakened. My general health is good, I eat healthy food, take a daily vitamin supplement (Alive brand men's gummie's) plus one 250mg vitamin C (as sodium ascorbate) chewable per day. Every morning before leaving for work I eat a robust breakfast, protein content at least 25 - 30g, and adequate calories. I exercise at a gym three times a week on my lunch break, consisting of a 20 minute 2 mile run on tread mill as warm-up, then about 40 minutes with free weights and a few machines in strength training. Long story short I feel like I'm doing everything right, and although I'm 56 I'm in good physical condition, fit, I'm getting sick too often. So I'm trying to put my finger on why I'm catching colds so easily. I wash my hands often and I'm not one to go hand to mouth/eye/nose, i.e. entry points for cold viruses. I have had sleep disturbances ever since the accident, related most likely to the broken neck and brain bleed, but I made a full recovery, exceptional recovery according to the MD's. I guess it could be due to the sleep problems, I wake probably at least four times per night, twice to whiz and at least twice for no apparent reason other than to shift my head around to a better position on pillow(s) because of a stiff neck in the area of the C6 and C7 which were the fractured ones. That would be the trauma related osteo arthritis the neurological MD said commonly develops in cases like mine. I don't feel tired through the day, so I don't think the wake-ups at night are that big of an issue. I do have a titanium rod in the marrow of my right humeris bone (elbow to shoulder bone) from the accident that I wonder if my body is somehow reacting to, by the bone marrow system scaling back on immune response or something. We do know bone marrow is key to immune response, and sometimes the body can have unusual reactions to various types of implants. The surgeon played it down and said they rarely remove those rods "unless there's a problem."