Hi Alex, Interesting info about a hyperactive immune system, but I I am sure it is not the case for me. My neutrophils and lymphocytes are usually well below the normal minumum, or at the minimum, even when I have a raging cold and they should be really high. Colds last me about 6 to 8 weeks usually, and have sometimes gone on for 5 months! I admit that some of these could be flu instead of a cold, my immune system is incapable of mounting a fever so it is hard to tell the difference. I suppose the way to tell the difference between those of us with overactive and underactive immune systems would be to have frequent blood tests. I have my white blood cells tested every week these days as my doctor wants to keep a close watch on my suppressed immune situation. I'd be curious to know if anyone else has had their blood tested during a cold to see what the white blood cells are up to?