C404 Wronged wronged wronged

"About this, I've already asked Bi to look for it. I'm going to vaccinate everyone."

"Inoculation of vaccinia?"

Zuo Pianfan's hands stiffened, his expression was no less than five, the first thing he did was to ask a question.

"Well, take out a little pus from the scab and inoculate it onto a healthy person. Let them be immune to smallpox first. This is how my master used to save people