Cheryl, while not precisely the same, after the surgery, radiation and chemo, I had no white cells and developed a whale of an infection. They put me in isolation and ran antibiotics IV for several days. Because your husband is being treated aggresively, I don't think you have to press the panic button. You don't say when he finished radiation, but that can seriously compromise one's immune system, and when that is the case, only massive doses of antibiotics will knock out an infection before it gets out of control. Again, don't panic. His treatment seems to be very appropriate. Good call by the ENT!
Joanna