KNOXVILLE, Tenn. — The MEDIC Regional Blood Center said that it has a critical need for several blood types. Officials said that the blood center has less than a two-day supply of several blood types, including O-negative, O-positive, A-positive and A-negative.

Officials also said that the blood center has a low inventory of B-negative type blood.

Donors will receive a MEDIC gift, a $10 gift card sent through email, a Salsarita's coupon, Petro's coupon and a Texas Roadhouse coupon. They will also be automatically entered to win a $500 e-gift card.

Walk-in donors are welcome, but appointments are also available. People who schedule an appointment will have priority during the screening and check-in process. People can schedule appointments online. They will also have several blood drives throughout Knoxville.