If you're vaccinated then therefore you are protected...no need to be a scientist or digest peer reviewed studies etc to understand this. Therefore if you choose to vaccinate you have absolutely nothing to fear. As for immunity, if you're over 30 and unless you've had any sort of "booster" recently then you have zero protection anyway; those high school vaccinations wearing off long ago.........adults account for the vast majority of the population.
As a sick adult, eg if you have whooping cough, you also have a choice (and responsibility) to exclude yourself and not spread disease to those too young to be vaccinated. Such hypocrisy and lack of self education is why this whole topic becomes irrational.
As for facts, ALL medical procedures and medicines carry risk. It is for the individual to assess risk vs benefit as to any medical procedure that is performed on their (or their child's) body. Especially so in Australia which currently has no vaccine injury compensation scheme as the UK does. If you have a serious adverse reaction you're on your own.
With regards to whooping cough in particular, the issue of "community immunity" isn't due to people choosing not to vaccinate, its because the actual vaccine has been out of stock since late 2015 and will continue to be so for good while longer.....but lets not let the facts get in the way of making such judgement.