Toxoplasmosis is very intriguing, it has actually evolved alongside cats and humans for ages. While anyone with an immunodeficiency is at higher risk of severe side effects, like with any pathogen, it’s also associated with taking bigger risk. This is why a ton of motorcyclists and casino regulars test positive for the parasite. But when we were hunter gatherers, the infection was associated with bringing home bigger kills, which helped the entire tribe. Due to this, toxoplasmosis infections had sizable benefits and those with the infection often had positions of power in tribes!