[MaximumYComb]

I had post-viral syndrome from glandular fever when I was ~32. It sucked. Like you, I was a wreck for 6 months. It took 2-3 years before I could exercise properly but my life was decent enough at the 12 month mark. My research at the time indicated that rates of post-viral syndromes vary by disease. Glandular fever is known to cause it in 10-20% of adults who fall sick.