Conversation so far:
recognition proteins are used by white blood cells for what purpose
what kind of white blood cells are there
There are five major types of white blood cells: neutrophils, lymphocytes, eosinophils, monocytes, and basophils.
why is the number of white blood cells important
Having a higher or lower number of white blood cells than normal may indicate an underlying condition.

Question: what is the count used for
Self-contained rewrite: what is the white blood cell count used for