[1] is a summary of the impact on the brain of Covid-19 infections including IQ reduction but many others besides. Its best understood that there is no such thing as a consequence free Covid infection, it always damages something and the early british experiment where they intentionally infected young men resulted in all of them loosing IQ and none of them being aware of the loss. This finding has been built on substantially in the past 6 years and we have a much large list of issues now, none of it treatable.

[1] https://theconversation.com/mounting-research-shows-that-cov...

the trend started before covid...