I, ah, probably haven't, actually. I've been a little...distracted.
I'd rather talk to Anders, and he should be able to read this as well. Asking Morrigan for information requires at least an hour of her insulting me, with no guarantee that she'll tell me anything afterwards. Besides, all my fireproof armor was left in Thedas.
But, you have a son? So it's at least possible? And twenty years in the future, hmm...might be worth asking them if the taint is affecting us by then. Though perhaps it won't. There aren't any Archdemons to call us, here, and nowhere for them to call us to, presumably.