A common virus that causes glandular fever. The Epstein Barr Virus (aka EBV) has been proposed as a possible trigger for MS. EBV, also called human herpesvirus 4, is a very widespread virus. References: MS Trust. Epstein Barr Virus. Available at: https://www.mstrust.org.uk/a-z/epstein-barr-virus. Accessed April 2020