It's estimated a third of the global population already carry the parasites.
https://metro.co.uk/2024/07/29/parasites-used-treatment-alzheimers-parkinsons-21317330/?utm_source=dlvr.it&utm_medium=blogger
https://metro.co.uk/2024/07/29/parasites-used-treatment-alzheimers-parkinsons-21317330/?utm_source=dlvr.it&utm_medium=blogger