Viruses can be used as tools in medicine, for example bacteriophages - viruses which infect bacteria. There should, in theory, be a bacteriophage capable of killing every single bacterium on Earth.
It was a method akin to what d'Hérelle outlined in his book "The Bacteriophage and the Phenomenon of Recovery," which Eliava translated. Originally from India, Biswas followed his family's ...