Natural killer (NK) cells can mediate antibody-dependent cellular cytotoxicity (ADCC). NK cells also kill cells not bearing MHC class I molecules on their surface.
■ What mechanism do NK cells use to kill "self" cells?
■ What can cause a "self" cell to not bear MHC class I molecules on its surface?
■ What selective advantage would a virus have if it interferes with the process of antigen presentation?