What is the difference between HPV4 and HPV9?
What is the difference between HPV4 and HPV9? Gardasil (HPV4) provides protection against HPV types 6/11/16/18, Gardasil 9 (HPV9) provides protection against HPV types 6/11/16/18/31/33/45/52/58 and Cervarix (HPV2) provides protection against HPV types 16/18. Is…