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Yarrow's avatar

high-vax, low-effect countries like France need explanation, though. Even if it is multifactoral.

Was there a difference in which shots were used? Could it be a difference between vax batches? Any way to track what went where? Any correlation between genetic subgroups? How much immigration are we talking about in various countries? We do know where the most UKR refugees are showing up-- can we bust those countries out and analyze them separately? Is there any correlation by total population vs. rate of recent immigration?

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Morrt's avatar

The vax-sperm-quality study found that after an initial sperm-quality decrease the median but not the average sperm quality recovered. This suggests that a subgroup of below 50percentile sperm-quality donors suffered a persistent quality decline. This would be consistent with a "sub-group-hypothesis": there is no comulative fertility effect of the vaccines, because the fertility decline is due to a persistent effect in a subgroup after initial vaccination.

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