Map of MS Prevalence

Developed by Khawai.

Multiple sclerosis (MS) is the most common autoimmune disease affecting the central nervous system. As of 2013, the estimated number of people with MS worldwide has increased to 2.3 million, or about 33 people with MS for every 100,000 people, according to a global survey by the MS International Federation (MSIF). That's up from 2.1 million in 2008. But MS rates and care vary widely from country to country.

This choropleth map displays information on the epidemiology of MS around the world. The projection used is the Mollweide projection.

The data were extracted from the Atlas of MS, the most extensive worldwide survey of the epidemiology and the global availability and accessibility of resources for people with MS. The 2013 update included responses from 104 countries, representing 87 percent of the world's population. Some data, such as prevalence of MS, was available from only half of the 104 countries. Most countries have no rigorous way of counting MS. Each country's data were collected from a single key person, who compiled the best estimates from official and unofficial sources.

Note: In the map views below, white signifies no data available.