Sorry to derail:

Who on earth says that you can't get strep throat after age 20?!?!?! Last time I got it (in my early 20s) I went to the doc and he, who was old and should have been retiring because his hands were THAT shaky (he actually hurt me due to the shaky hands! He also told me I need to quit smoking - I don't smoke!!!) and when he finally really looked at my throat informed me that it was the worst case of strep throat he'd ever seen.