Some 13,000 people might be at the risk of fungal meningitis that has already infected 105 people and killed at least 8 in 23 states, according to the estimates by the Centers for Disease Control and Prevention (CDC).

"We know that 13,000 people received the injection. They received it at facilities across the country. They are at risk," said Jamila Jones, a public affairs specialist for the CDC in Atlanta, reports Boston.com.

According to the reports, the meningitis outbreak occurred after the steroid injections (methylprednisolone acetate) made by The New England Compounding Center (NECC) were given to people with back pain from June 27 and September 28, 2012 in Nashville and between July 1 and September 28, 2012 in Crossville and Oak Ridge, says a news release from the Tennessee Department of Health.

The NECC voluntarily recalled all its products Saturday. The company added more products to the recall list including acetaminophen suppositories, nipple ointments, morphine, vancomycin and vitamin K.

The drugs that are likely behind the meningitis outbreak were manufactured since May and distributed to 76 facilities in 23 states until September, Reuters Health reports.

According to the CDC, California, Connecticut, Florida, Georgia, Idaho, Illinois, Indiana, Maryland, Michigan, Minnesota, North Carolina, New Hampshire, New Jersey, Nevada, New York, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Virginia, Texas and West Virginia have received the tainted product.

The list of facilities that have received the implicated product can be found here. The list of the states that have had meningitis infection cases can be found here.

Symptoms of the meningitis infection include headache, fever, nausea, and stiffness of the neck, confusion, dizziness and discomfort from bright lights, according to the CDC.