This is really basic stuff, immunisations are only effective if almost everyone gets immunised. This is what I'm trying to say, its an important point.
Then explain it fully - no more "man" headlines, give some details on why you think immunisations will only be effective if everyone gets done.

Because from this, I get the feeling you are under the assumption that man (as in human kind) can wipe out all disease through immunisation. Again, a lovely sentiment - it really is, but it's not practical. That's what they thought about antiseptics and antibiotics until their expansive overuse created "super" bugs that are far more dangerous than the original. Diseases, virus, bacteria etc. are living organisms - they will adapt and evolve (the whooping cough mutation shows they already are).