[discostu]

Yes. The higher the percentage of the population that uses vaccines the more effective they are, enough exposure to a disease can over power any vaccine the only way to make them 100% effective is to have 100% of the population vaccinated. And in this modern world nowhere is more than 48 hours from anywhere else, you've got to look at it from a global perspective.

Since you have yet to provide any compelling evidence that any of the current vaccines pose any significant side effect dangers, you haven't even presented evidence compelling enough to warrant more research. And even the most terrifying scare tactic "evidence" doesn't present vaccines as even remotely as dangerous as the disease they're fighting. I see no compelling reason to not vaccinate the world. We can make exception for those with religious problems with modern medicine, but everybody else should roll up your sleeves. I'll go first, it'll take a bit, I have a terrible fear of needles.

[TomB]

enough exposure to a disease can over power any vaccine

Actually that isn't quite correct. No vaccine is 100% effective. That means, in a population of a couple hundred vaccinated people, a couple will not have full immunization. So what we depend on is what's called "herd immunity", which is essentially immunizing as many people as possible so as to stop the spread of a disease before it has the chance to reach one of the susceptable.

Look at it this way. 100 people are in an enclosed room with only one entrance. They have all been vaccinated against disease X. However, there are a couple people scattered in the group who don't have immunity. Now, suppose someone from outside the room carrying diesase X comes up to the doorway and has contact with the person standing there. Chances are very good that the person in the doorway will be immune to the diesase and, therefore, can't pass it on to the ones who are not immune. They have indirectly been protected from disease X.

This isn't a perfect analogy, but it shows why it is important to immunize as many people as possibly, and why diseases reemerge when immunization rates fall.