Cass smiled, pleased with the curiosity. 'Not like the flu,' he said with a shake of his head, pondering how to explain what had happened. He looked at Percy, suddenly not sure how to handle the question. He didn't want to scare the boy, but he didn't want to lie to him either.
'I had an accident and I was very sick for a long time. Couldn't even get out of bed for weeks,' he said finally. Not the complete truth but really he couldn't tell a six year old about Death Eaters and attacks and death. He figured the lie was better.
He looked at Percy, hoping he'd agree with him. 'Shall we go upstairs?' he asked the both of them.