In 1992 I had glandular fever virus that was misdiagnosed as tonsilitis...I was pumped full of antibiotics for 12 months and havent been the same since. Whether it was the glandular fever/epinstin barr or the antibiotics I dont know. Perhaps the combination of the two. They reckon that glandular fever lays dormant in the blood, weakening the immune system and also damages the liver. I have been sick a long time with periods of recovery. HOwever I have found all it does it come back if you get weak, stressed or ill - it also gets stronger, gives more symptoms and is harder to get rid of. If I had known what I had years ago I think I would have stood a better chance of recovery but in the early days no-one knew of candida/dysbiosis/leaky gut.