"I want to locate lab equipment so we can run blood tests to check for the virus. I encountered someone in arts and crafts who should be infected with the T-Veronica virus," Mentioning that would probably make William upset, but he needed to get over that.

"I also want to test everyone else here who should have one of the viruses in their blood," Best to get right to the point so William would agree to it. The specifics can be ironed out later. Hopefully he'd be happy about what needed to be done.

"I need to know if you are still infected with the G-virus, and if the boy has the T-veronica virus. First, though, we should run a test on my blood, since I have noticeable effects from the virus you gave me." And once they had tested themselves, he could let Birkin run tests on samples gathered from monsters here as needed.