Eric slept for an entire day. When he woke up, he felt completely refreshed. Seeing Sylvia sitting in the room, he was startled.

"You didn't stay up all night watching me sleep, did you?" he asked.

"Of course not," Sylvia replied. "I couldn't stay up any longer than you could. When I got sleepy, I slept too. It's already noon outside."

Eric hadn't noticed the time. Knowing that Sylvia was by his side, he had fallen asleep quickly. However, he was still concerned about the vaccine. "Did the fo