And because we have the acquired Immune Deficiency Syndrome we have a very, very weak immune system. Any type of infection that enters our body can essentially kill us off. And that includes the common cold. So it's not the actual HIV that virus that kills us but it's what it does that ultimately kills us. It's the fact that we create a very weak or the virus creates a very weak immune system and any infection whatsoever can essentially kill us off. Now, the next question is what's the big deal about these helper T cells?