Cat owners may have brain parasites and not even know it.
This parasite is nothing new? Anyone who has ever had a cat has heard of it, and I'd say plenty of people who never had a cat also have heard of it. However, the percentage of cats actively shedding the parasite at any given time is incredibly low, sitting at only 0% to 1% so it's not that big of a threat.
This feels like saying "Guys! Look up (whatever well known virus or parasite, say influenza) it'll ruin your day". Lol