by Chris Black
For reference, two standard deviations is the difference between average European IQ and average African IQ.
Authors believe that mask mandates and lockdowns are impairing early childhood development: “our results seem to suggest that early development is impaired by the environmental conditions brought on by the pandemic”
Source: www.medrxiv.org/content/10.1101/2021.08.10.21261846v1.full.pdf
Lockdowns and face masks seem to cause a greater reduction in childhood intelligence than domestic violence (8 point reduction in IQ):
pubmed.ncbi.nlm.nih.gov/12931829/
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