Yes, everytime I begin to take vit. C....a cold/flu comes on like clockwork.
Me too, more or less. Sometime in my 20's, I noticed that whenever I ate oranges or had orange juice, I'd have some cold symptoms the next day. Just a sneeze or two and a slight feeling of a cold coming on, but then it would pass. It got my attention because VitC is supposed to
prevent colds. It was just a minor oddity, so I didn't investigate any deeper.
Then at age 39, I ate some oranges, which I rarely did, and felt a flu coming on. It was gone the next day. A week or two later, I drank some OJ (it was on sale), and again the flu symptoms occurred, more severe, and passed the next day without developing further. I tried more OJ, and felt fine the next day. The following day, the flu symptoms abruptly rose, and I noticed that it was exactly the same time of day that I'd drank the OJ, and this time the symptoms were much more severe, including fever, sweating, etc. After that, I had the same response to other fruit juices that hadn't been a problem. It wasn't long before I had that reaction to other foods, until only the simplest foods (rice, cornstarch) didn't trigger a response.
I did figure out that it was a type IV reaction (t-cells), with a precise and consistent 48 hr delay. The medical system was no help at all. A rotation diet allowed me to eat more variety, one food family every 5 days. Then, 2.5 years after it started, some spoiled coconut milk flushed me out, and the type IV reaction was gone. It took a couple of years to realize that, because the same symptoms remained, except with a 20 minute delay. Eventually I figured out that what I had was ME.
So, did the type IV reaction trigger ME, or did I develop ME which triggered the type IV response?
FWIW, my immune system seemed quite strong before the problems started. I got fewer colds and flus than my sister, and my infections lasted much shorter. Many of my colds were just a few sneezes for a day or two.
There was a poll on immune response
after developing ME. I can't find one on immune response
before ME.