So I just asked a question but this is more specific details. For two days I've felt like I had the flu, hot and cold flashes, nausea, stomach ache, headache, somewhat sore throat, but no other symptoms, no runny nose, no cough, no diarrhea. So I'm wondering if I have a high ANA could it be that my immune system is over active and so I don't get the full blown symptoms when I'm sick? I also heard that if your immune system is high with an autoimmune disorder its harder or less severe when you get sick or have food poisoning. Is that true?