Volunteers are needed to help with the second in a series of meningitis vaccine clinics being held on the UO campus to inoculate students against the potentially deadly infection.The next clinic will be May 12-14 from 2 p.m. to 8 p.m. at Matthew Knight Arena. Students will be given the second in a series of three shots with the Trumenba vaccine.Volunteers are needed for three daily shifts: 1:30 p.m. to 4:30 p.m., 4:30 p.m. to 6:30 p.m. and 6:30 p.m. to 8:30 p.m. People are urged to sign up for one or more shifts.