Deadly Poison Doctor

Yunyang, who was terminally ill, woke up and suddenly found that he had returned to the day when he was diagnosed with leukemia. Moreover, he obtained the deadly poison doctor system, which could transfer the virus to other people.
From this moment on, life is completely different.
What kind of skill is it to treat ordinary people?
Treating vixens, operating on vampires, and pretending to be aggressive among superpowers is good enough.
If I say you are sick, you must be sick!
If I want you to die, you have to die; if I let you live, you can live!
There is no disease in this world that I can't cure, only the consultation fee that you can't afford!
I am Yunyang, a poison doctor who kills people.

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