I really don't get T. Gondii. I read all these article about how it might be affecting us, a source of mental health disorders, so on and so on. And it is very common in household cats + a lot of people already have it. CDC says, "While the parasite is found throughout the world, more than 40 million people in the United States may be infected with the Toxoplasma parasite." I assume present tense means currently infected?

Genuinely curious, why aren't we doing an annual anti-parasitic or something given the drugs are relatively benign?