Hi everyone, just wondering if anyone has any advice or information they might be able to give me. My immune system is terrible; if there's a bug going round then I catch it. I take vitamin C and zinc tablets every day, as well as a probiotic drink called Symprove. However, this doesn't seem to be helping at all so I was wondering if anyone here had any ideas. To give you further information about it under performing, I have some examples: - I had Cryptosporidium (a parasite) back in April which is supposed to last only 3 days maximum. I had it for 2 and a half weeks and was hospitalised. I did have glandular fever with secondary infection of tonsillitis at the same time which may have hindered my immune system, but doctors obviously didn't think that was the case because they actually tested me for HIV... - In August 2013 I had my gall bladder removed and before the operation they did a blood test to check for any abnormalities. My blood count was normal. Upon opening me up though, they found massive infection in and around my gall bladder, which had turned to mush, and had to sprinkle antibiotic powder all over my abdomen and give me two days' worth of IV antibiotics. Why were there no signs of this in my blood test, like extra white blood cells or antibodies? However, to make things more complicated I also have an overactive immune system; I have lots of food and fur allergies. I was just born with them! I sleep well, at least 7 hours every night, eat well with plenty of fruit and veg and exercise at least three times a week. I'm a healthy weight and walk outside to get fresh air every day. So, any suggestions please?