Hong Kong and US scientists believe illness is a coronavirus

Scientists at the University of Hong Kong's department of microbiology believe they have identified the cause of the outbreak of severe acute respiratory syndrome as a new strain of the coronavirus.

Epstein-Barr virus may increase risk of multiple sclerosis

Evidence is mounting that infection with the Epstein-Barr virus (EBV), which can cause mononucleosis, may also increase the risk of developing multiple sclerosis later in life.