More Worries!!! I just started figuring this info out, sorry if it is old news. I have been researching EBV and types of cancer and health issues in my family. I keep reading about vitamin D defeciencies and cancer, them found EBV and cancer links. http://www.cdc.gov/ncidod/diseases/ebv.htm http://www.mayoclinic.com/health/nasopharyngeal-carcinoma/DS00756/DSECTION=4 Epstein-Barr virus. This common virus usually produces mild signs and symptoms, such as those of a cold. Sometimes it can cause infectious mononucleosis. Epstein-Barr virus is also linked to several rare cancers, including nasopharyngeal carcinoma.