The vOLLUnteer Unity Council and the Center for Service-Learning and Volunteerism (CSLV) are sponsoring the National César Chávez Blood Drive Challenge Wednesday and Thursday from 9:30 a.m.-4 p.m. in the Library Circle. Participants must be at least 17 years old, at least 110 pounds and in good health to donate blood. Photo ID is required.

Students will receive one volunteer credit hour for donating blood.

Everyone who donates will receive a T-shirt and a chance to win a pair of plaza level tickets to a San Antonio Spurs game.

For more information, call 210-431-3919.