Leon climbed up the building and jumped to the stairway of the floor that had the laboratory.
For some reason, Leon thought he would get his cure in the laboratory rather than the hospital. However, to find the cure, he first needed to figure out its cause. That's why, he came to the laboratory for the tests.
It was still only 7 AM in the morning, and the chances of the laboratories being open were less. However, Leon went to the laboratory because he saw the lights of the office turning on and the curtains opening. He was certain that there was someone in the laboratory.
Leon had come back to his senses when he was having sex with Mika. It calmed him down because he realized there were people who loved him and wanted him.
Leon stood in front of the laboratory door and tried to hear any sound to figure out how many people were there. But much to his demise, it was silent.