Which is? Even condom use only reduces HPV transmission by 50%. Ref:
here
Look at the effectiveness of regular PAP smears. They almost always prevent an occurrence of HPV induced cancer. And they have NO side effects, as opposed to the HPV vaccine which can (and do) have devastating "side effects". I think it's important to look at the risk/reward ratio of both. Does it really make sense to condemn tens of thousands of young adolescents to a lifetime of ME/CFS symptoms if that risk can be sensibly avoided?