zoonosis
Explanation
The Joke
The comic features a supervillain-style character who calls himself "Zoonosis." He announces his villainous credentials: "They call me Zoonosis. I have filled my house with thousands of cats in the least hygienic conditions. They are a breeding ground for the most horrific diseases. By living in their filth, I increase the chance of a feline disease leaping from cats to humans." He declares himself the "conduit to Hell" who can "summon the catastrophic lightning" and proclaims: "I am made manifest!"
The punchline reveals that this is not actually a supervillain -- it is a scene where someone (possibly a relative or social worker) has brought his daughter to "make him feel like a functioning person." The daughter offers a "guardian form" to fill out, and his mom tells him "the neighbors think your house smells bad and looks untidy." The dramatic supervillain persona collapses into the reality that he is simply a cat hoarder with mental health issues, and his family is trying an intervention.
The Humor
The comic builds up an elaborate supervillain origin story only to reveal the mundane and somewhat sad reality underneath. The character who styles himself as "Zoonosis" -- a terrifying disease vector -- is really just someone living in squalor with too many cats. The dramatic language about being a "conduit to Hell" and summoning "catastrophic lightning" is recontextualized as the grandiose delusions of someone whose family is worried about them. The humor works on the contrast between the self-image (powerful disease-spreading villain) and the reality (person whose mom thinks his house is messy). There is also a layer of dark comedy in how the comic addresses cat hoarding, a real and serious problem often linked to mental health issues.
References
Zoonosis (plural: zoonoses) is a real scientific term for infectious diseases that jump from animals to humans. Notable examples include rabies, bird flu, and toxoplasmosis (which is specifically associated with cats). Cat hoarding is a recognized form of animal hoarding, a behavioral condition associated with obsessive-compulsive disorder and other mental health conditions.