mikejs78
Well-Known Member
The fact that MMR is 97% effective against measles after 2 doses probably has a lot to do with why you don't see measles outbreaks.
Do you even know what that number means? It means you have a 97% less chance of catching it than an unvaccinated person in similar circumstances. But if you went somewhere that had high spread of measles and a low vaccination rate, your change of catching it would be much higher, although much less than that of an unvaccinated person Vaccinated people still get measles. But because everyone is vaccinated in the US and Europe and many other parts of the world, the chance of getting it is infinitesimal. It's math.
Anyone else getting tired what the CDC says anymore? They keep moving the goal post. Previously Fauci said it we got to 70% vaccinated we would be good, then he comes out and explain that he misled us for our own good. Now we are at the point that boosters are necessary after several months…
It's called science. Science evolves as it gets new data or things change. The 70% was based off of the initial strain which had an R0 of 2-3. Even Alpha only had an R0 of 3-4. But Delta has an R0 of 6-7, making it a lot more transmissible and therefore needing a lot higher level of population immunity - hence the newer number of 80-85%.
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