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by oceanplexian
1718 days ago
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Speaking specifically to the Pfizer vaccine, it’s gone from 95% effective against preventing severe symptoms against the Alpha variant to 88% against Delta in less than 6 months of the vaccine being widely available to the public (With some even less optimistic peer-reviewed studies coming out of Israel, I’m just going by what the CDC is reporting). So under these circumstances, maybe it makes sense to wait a year or two before making claims about the long-term effectiveness of the vaccines. If they aren’t effective long-term some people might make different decisions about what vaccine they decide to take. |
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Based on your wording, it sounds like you have the mistaken impression that the mRNA vaccines are expected to account for and target all future variants. A future variant may have a large enough mutation to the spike protein and render them 0% effective. But they can rollout a new vaccine very quickly with EUA. Sorry if I've misinterpreted.
I don't remember ever seeing #s promising long term effectiveness, but eventually later seeing a chart with projected effectiveness waning over time. What they should do is be careful to present variant specific numbers. There's too much generalizing, like I did as well, lumping Pfizer and Moderna together.