Hermione made a note to ask people who had shared dreams if it had happened a second time. "We also need to see if it transmits like a flu, because it might not. We need to see if, say, Student A dreams about Student B, if Student B is then going to drag in Student C and so on. But ultimately, I think we need to bring a professor in on this. We can't do it just us. Madame Pomfrey needs to make the decision, in the end."