On top of the gay plague, the vax they are giving for it is live small pox virus in a bottle. For six months after receiving the bifurcated injection, the plaguer can infect anyone around them with small pox.
Of course the cause for all this climate change.
Smallpox is airborne contagious.
A plaguer can infect you with smallpox by breathing your air if he's had the pox vax weapon.