Are "doctor's office" children's toys free of germs for your children to play with?

I was in Bill Wilkerson’s Hearing Aid Center at Vanderbilt today. I waited my turn to have my hearing aids checked out. They took me to the children’s room (only one available)for my visit. As I waited, I noticed a large group of children’s toys in a box. Then, this question came to me. How safe are these toys for all children to play with? Not from a safety standpoint of safe toys, but from a germ and bacterial standpoint. Are these toys ever cleaned? Are they passing germs from one child to the other? Or, do the germs they contain, eventually die and there is no threat of cross-contamination?