There's also a strong correlation between the demographics of those who tend to have higher rates of mental illness and those who tend to suffer more from long covid.
“ In an analysis of almost 55,000 adult participants in three ongoing studies, having depression, anxiety, worry, perceived stress, or loneliness early in the pandemic, before SARS-CoV-2 infection, was associated with a 50% increased risk for developing long COVID”
https://www.bu.edu/articles/2021/depression-rates-tripled-wh...
Read more carefully that isn't what the paper showed - it showed that those with previous psychological problems were 50% more likely to have long covid COMPARED to those that didn't have previous problems