>I still don't understand the logic. If you choose not to be immunised against a particular disease and everyone else has been then to whom do you pose a threat?
Once there is more than 1 person that didn't get a vaccination, there is a threat. Only if there is exactly one person that didn't get a vaccine in the entire world there is no threat to anyone (though we don't know if the vaccine is 100% effective).
If it's not broken, fix it until it is.
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