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Unfortunately, again, the vaccines were not applied to a single population as a variable, so there’s no evidence I don’t think to see a causal link: those who s
by richardatlarge 4y ago
Unfortunately, again, the vaccines were not applied to a single population as a variable, so there’s no evidence I don’t think to see a causal link: those who seek out such shots are a somewhat unique population
- lost_tourist 4y agoI'm lost, people who seek out flu vaccines are a unique population?
- moloch-hai 4y agoThis is an example of the old trope that only random controlled trials (RCTs) can demonstrate causation. It was doctrine enforced until the '90s. Nowadays, statisticians have protocols to extract a causation signal from population studies that are large enough. That is not to claim lack of vaccination causes dementia. But it means something affected by vaccination does. When you follow a cohort of 46,000 patients for six years, you get enough good data to draw strong conclusions. That the same numbers came out for a disjoint population of 12,000, over the same period, demonstrates it. But statistics only points you in a direction, it is not biochemistry.