If you truly have hepatitis C, it was just coincidence it was diagnosed at the same time as the glandular fever, not a cause or a result. You probably have had it all along, and your doctor did some tests to diagnose the glandular fever and found some abnormalities suggesting liver inflammation, which then caused him/her to check you for hepatitis C. It could have been there awhile as it often causes few symptoms. People go for years without noticing anything while it silently progresses into liver cirrhosis over decades. This is not AIDS and hepatitis C is rarely contracted via sex. It most often occurs with transfusions of blood or blood products, or from sharing needles to inject drugs. Glandular fever can also cause inflamed liver, but if hepatitis C has definitely been diagnosed, you need to get it treated, even if the liver inflammation from the glandular fever got better. Hepatitis C can cause low-grade inflammation for decades which slowly turns into liver damage. There are now some good treatments with a high cure rate that have few side effects. Hope this helps.