FEV infection would make normal virus-protection completely redundant, from what I've read and as Kyuu has already stated. It doesn't matter which cells are infected if there's a virus in them that destroys the genetic code of the HIV.
Furthermore, leukocytes is a way too broad term to use in that manner. Not all leukocytes protect against virii, and only a subset of leukocytes, helper T cells, are infected by HIV.
Furthermore, leukocytes is a way too broad term to use in that manner. Not all leukocytes protect against virii, and only a subset of leukocytes, helper T cells, are infected by HIV.