FDA expected to announce new warning on Johnson & Johnson vaccine related to rare autoimmune disorder – The Washington Post
Guillain-Barré syndrome usually occurs at a rate of about 60 to 120 cases each week, according to CDC data. While the cause is not fully understood, it often follows infection with a virus, including influenza, or bacteria. Each year in the United States, an estimated 3,000 to 6,000 people develop the illness.