Multiple sclerosis linked to infection in adolescence

Multiple sclerosis (MS) is most often diagnosed between the ages of 20 and 50. Certain genes put a person at greater risk of getting this disease of the central nervous system, but scientists are still trying to understand the triggers. My colleagues and I have been studying these triggers for many years. Our earlier research found that pneumonia in adolescence is associated with a raised risk of MS, so we decided to investigate whether other types of infection are associated with the condition.