Facebook has just deleted one of those types - David Icke (English, retired football commentator) - for spreading that virus/5G twaddle.
Whether he originated it I have no idea, and perhaps no-one knows.
Some such people are merely ignorant, gullible and frightened of technical advances they rely on and take for granted, including radio-telephony; I suspect others though of being wilful liars with malevolent motives. Only Icke can say which camp he inhabits.
Some apparently are so scientifically ignorant that they think you can broadcast micro-organisms by radio - and cannot see the irony of using modern electronics to spread their ideas.