Is There a Possible Connection Between HIV Infection and a Lower Risk of Multiple Sclerosis?

An analysis of two large, population-based databases suggests that people with human immunodeficiency virus (HIV) are at lower risk for developing multiple sclerosis (MS), a finding hinted at in previous research. In particular, people who are HIV-positive with a history of taking antiretroviral therapy (ART) were less likely to develop MS than people in the general population, according to administrative health data from Canada and Sweden.