Humans are not immune to Toxoplasma gondii — in fact, at least a third of the world's population is thought to have toxoplasmosis, the infection this parasite causes. Some humans get infected when they clean out their pet cat's litter box, but many of us simply eat undercooked meats or unwashed vegetables. So, what does this mean for the one in three of us who end up playing host to the parasite?
