>>>This is trumpeted as a good thing but whats the downside.
>>>Where do we draw the line on how good for everyone something has to be for it to be compulsory for the individual..
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>No trumpeting, just visit that site and compare the effect on the community of 80% vs 95% immunization rate.
Just like any other mathematical model, it's a load of assumptions. Like the vaccine itself being top quality, people being otherwise healthy etc etc.
The nice thing is that numbers don't lie. The distance between the reality and the result they get is the same as the distance between the reality and the initial set of assumptions.