Steph, there are several milk banks around the country that collect breast milk; the donors are heavily screened and the milk is pasturized just like cow's milk.
SM, further ickiness just for you (you're welcome):
This lady says it is impossible to make breast milk cheese. (EWWW)
But
this French cheese company apparently
does. (double EWWW) But my French sucks so I may be misreading.
And I think
someone has a little too much time (and milk) on their hands. I mean honestly, who thinks, "gosh, my contact is dirty...I think I'll squirt some breast milk on it."?