According to the National Institutes of HealthTrusted Source (NIH), rheumatoid arthritis affects millions of people worldwide, with up to 1% of some countries’ population having rheumatoid arthritis. The NIH notes that between 25 to 27.5 people per 100,000 in the U.S. have rheumatoid arthritis. This article from Medical News Today covers a study that shows how Acupuncture may help reduce stroke risk for these people.