From a lot of the reports I have seen, Millie's have survived them. Don't know why. Then there are reports that the millies are the most infected. It might be a different species.
I am scared to add corals to my tanks now.
On the last few pieces I have received, I have stopped the dipping I normally do and put them strait into quarantine. My theory on this is, if there infected, I want as many flat worms as possible to survive, so that I can identify the problem easier in quarantine. My buddy got them even after quarantine. He dips all the corals and thinks a few eggs survived the dip. Then in quarantine, he didn't identify the problem because the population was so low, he didn't see them. They only appeared in number once he added them to the tank.
That is why I stopped the dip! I want to see them early.
I think the problem is coming from a few wholesalers tanks in LA being infected. The turn over of corals is so quick in those tanks that the problem might not appear until later, plus those corals are weak from stress. The problem also showed up very quickly and is spread all around the US.