They came up with a theory that 5G EM waves cause toxicity within our cells that then leads to previously healthy cells producing viral toxic waste that the cells shed. Overall some people who adopted this theory don't even believe in germ theory or that a virus will spread one person to the other.
It is all BS, I would just stay away. We live in a country with free speech, so there will always be the Flat-Earther and other conspiracy theorists. The alternative is we destroy free speech.