Toxoplasmosis

I also learned yesterday at the doctor's office that I have toxoplasmosis, albeit at low levels. I can't understand this because I've been paranoid about getting it and have avoided the cats completely. But it turns out that the disease can even be airborne - I never had a chance. Hope the baby isn't screwed up, though the nurse assured me it wouldn't be? What's the point? Why do they get pregnant women all worked up about cats anyway?