The tumors that express the CCR5 are not going to be predictable by somehow identifying a personal axis before tumor development. For example, normal breast tissue has no CCR5 receptors but some breast cancers do. You will always need to get tumor cells to see if the abnormal cells express the CCR5 receptor and in what quantity. Tumors have minds of their own and their biological behavior is always hard to predict. That’s why cancer is so hard to treat. Nice thought but I don’t see it as possible.