The Centers for Disease Control said Monday that the number of people infected with meningitis related to steroid injections has gone from 91 to 105. The death toll has risen from seven to eight.

Patients in nine states contracted the deadly fungal meningitis after being injected in their spine with a preservative-free steroid called methylprednisolone acetate that was contaminated by a fungus. The steroid is used to treat pain and inflammation.

What is meningitis?

The New England Compounding Center (NECC), the Massachusetts-based pharmacy that made the contaminated injections, voluntarily recalled three lots of the injected steroid last week.