hi, my 4 year old has had a fever and headache for a couple of days now, Tylenol seems to help for a few hours but then it comes back. He is also complaining of his neck and back of head hurting. He is up to date on his vaccinations so does that mean that he has definitely had a Meningitis vaccine? Is it possible to still get it if he has had the vaccine? Or is there anything else that could be causing this?