>>>Interesting simulation comparing 80% immunization vs 95% herd immunity for Measles outbreaks.
>>>
>>>Select your State and region and see whether immunization would protect you:
>>>
>>>http://fred.publichealth.pitt.edu/measles/
>>>
>>>P.S. - graphics seem slightly messed up in Mozilla, maybe try IE.
>>
>>Well, of course it wouldn't affect *me* personally. I was vaccinated when I was a kid. < g >
>
>Not so sure. I've heard that the vaccine used at one stage isn't as effective as what's in use now. Maybe John can comment, but I've heard a recommendation that adults above some age should check with their doctors.
>
>Tamar

Refresh every ten years. That is what we have come up lately.