Look up the definition of communicable.
com·mu·ni·ca·ble definition
Pronunciation: /kə-ˈmy{uuml}-ni-kə-bəl/
Function: adj
: capable of being transmitted from person to person, animal to animal, animal to human, or human to animal
Okay. Now, please explain to me how HPV is NOT communicable, because it sure as heck appears to me that it fits the definition.
Furthermore, there is every reason to think that herd immunity dynamics affect HPV.