How many people are affected by Guillain-Barr syndrome ?
The prevalence of Guillain-Barr syndrome is estimated to be 6 to 40 cases per 1 million people. The occurrence of the different types of Guillain-Barr syndrome varies across regions. AIDP is the most common type in North America and Europe, accounting for approximately 90 percent of cases of Guillain-Barr syndrome in those regions. AMAN and AMSAN together account for 30 to 50 percent of cases in Asian countries and Latin America but only 3 to 5 percent of cases in North America and Europe. Miller Fisher syndrome is also more common in Asian countries, accounting for approximately 20 percent of cases in these countries but less than 5 percent in North America and Europe.