Harry shook his head. "I don't know for sure, but you and I aren't the only ones, I know that much." He squeezed her shoulder gently, and replied, "That's all right. you don't need to go into any more detail." He pursed his lips though, dark brows furrowing. "May I ask why you're here? At St. Mungo's, I mean?" A Calming Draught or sleeping potion were easy enough to obtain elsewhere; she must have had some other concern to bring her to the hospital.
Harry wasn't sure he should press for more answers, not if it was going to disturb her, but he needed to know more. Something was going on, and he only had bits and pieces to put together so far.