Peggy stilled silently but she turned her head to the side and studied him silently trying to figure out what he meant. Only one answer came to her and it seemed rather unbelievable but then wasn't there a saying that 'if there is only one option less it has to be right no matter how unbelievable it is' or something like that. They had been pulled through time and universes in some cases to the future - or past in a couple of situations - so... "Vampire?" she asked. "That's the only thing I can think of why you would need to kill to survive but... I guess we are in the future but I admit it is rather unbelievable," she admitted.
Still she was curious about it and she wondered if she was correct in her reasoning. She had seen a lot of unusual things in her life including the serum that had been used on Steve. Then there was Sargent Barnes and Red Skull then what happened during her year after the war had ended. Still, she wasn't sure exactly what she would think of her reasoning...