07-18-2006, 07:59 PM
Direct killing of cells infected with virus is usually accomplished by
a. CD8-positive T cells
b. CD4-positive T helper 1 cells
c. CD4-positive T helper 2 cells
d. plasma cells
e. CD19-positive B cells
a. CD8-positive T cells
b. CD4-positive T helper 1 cells
c. CD4-positive T helper 2 cells
d. plasma cells
e. CD19-positive B cells