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Even Mild Cases Of COVID-19 Can Leave A Mark On The Brain, Such As Reductions In Gray Matter
(today.tamu.edu)
It should also be noted that damage to this specific area of the brain within the cerebral cortex can cause sociopathic behaviour. Additionally, this induces the “slow and insidious loss of the capacity for moral rationality.”
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3139561/
I'd be surprised if any of them didn't catch it.