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There needs to be truth-telling about the reduced protection of mRNA vaccines vs symptomatic Delta infections. It was 95% pre-Delta. Many are claiming it's still ~80%. It isn't. 50-60% is best estimate from all sources (not US, since we don't have the data)pic.twitter.com/ep608YW0J7
Why is this important? Because we need to protect the protected, the fully vaccinated. Sure we want to get more people vaccinated, but truth engenders trust. And truth helps guide people to be safe, use masks, distance, ventilation and all the other tools we have and know helps.
Look at Israel's Delta case surge, a model country for vaccination, >15 per cent points more of total population vaccinated than the US. That, in itself, tells us about the reduction of protection of mRNA vaccines vs cases/spreadpic.twitter.com/DabSE9BvEE
I stand by my estimate, which includes soon to be published preprints with US data even lower than this range. But the protection vs hospitalization and death is solid, holding up well, and is the reason why everyone should be vaccinated
More data summarized here, and more to come out soon The Mayo Clinic study of 42% Pfizer vaccine efffectiveness vs Delta infections notedpic.twitter.com/RzNWHFLNYe
We need a booster.
It won’t matter. You get a delta variant booster shot in 3-6 months but then after 6-9 months you will be dealing with another variant. Always one step too late and there is nothing you can do about it. That’s just the nature of coronavirus.
Have they made / tested a delta-specific mRNA booster shot yet, or is the plan to jab people with a third shot of the original formulation, as they are trying in Israel? Is it time for another warp speed program for boosters?
The data you just posted from San Diego suggests 80%+. Data from Bay Area counties suggests the same.
Data from Quebec, Canada seem to suggest the same. That is really weird. I feel like real world data seem to suggest higher protection than papers.
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