The suspected virus, the Epstein-Barr virus, is most commonly known as the cause of mono.

FORBES: Multiple Sclerosis May Be Caused By A Virus

They found 56, 681 MS cases and 14, 621 cases of glandular fever, which is caused by the Epstein-Barr virus.

BBC: Virus and low sunlight 'raises multiple sclerosis risk'

Scientists believe that Mohammed's cancer is caused by the Epstein-Barr virus, which is better known for causing glandular fever.

BBC: Mohammed

Different research teams are already looking to different treatments for MS, one of which will target the Epstein-Barr virus.

FORBES: Multiple Sclerosis May Be Caused By A Virus

However, in some cases, the Epstein-Barr virus can find its way into cells of the immune system, which leads to some cancers.

FORBES: Multiple Sclerosis May Be Caused By A Virus