The Centers for Disease Control and Prevention on Sunday confirmed that four people in New Hampshire have fungal infections linked to a meningitis outbreak that has swelled to more than 200 confirmed cases nationwide and claimed the lives of 15 people.

Three patients have fungal meningitis — an inflammation of the brain — and a fourth person has a peripheral joint infection, according to the CDC, and all cases are related to apparently tainted steroids produced by a Framingham facility.