Ds is still wearing his pull-ups for poo & pee at 3yrs 1mo. His nursery school teacher (who's pg) now refuses to change him because she says she hasn't been vaccinated! Is she sane? Can you get toxoplasmosis from humans? This is obviously hideously embarassing & those damned pampers are expensive, too. How can i get ds to use the potty? Can it be done? He's very stubborn.