Well, somebody somewhere started all this. Whether the virus came from a bat or some other delicacy in a screeching, heaving market in China or as a result of a good scientific education channeled into evil, or if it was all a terrible mistake in a way we can’t yet imagine, somebody started it.
The song is a 1968 release by the Bee Gees and, on the basis that the writer sings the lead, the author was Robin Gibb. As ever with pop music, it doesn’t pay to take the lyrics too seriously; he may or may not have had some apocalyptic event in mind, but more likely he just came up with the title and made what he could of it.