A study of over 100,000 people in England found that found that cognitive deficits from COVID-19 infection (memory, reasoning and executive function) were similar between those whose symptoms resolved in less than 4 weeks and 12 weeks but were larger in those who had unresolved persistent symptoms (long COVID).
IQ loss from COVID-19 infection:
| Group | Cognitive deficit |
|---|---|
| Mild infection | -3 IQ points |
| Unresolved persistent symptoms | -6 IQ points |
| Intensive care | -9 IQ points |
Read Cognition and Memory after Covid-19 in a Large Community Sample.
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