Bacteriophages are highly specific to different strains, even inside the same organism. So essentially you would need to determine to a high level what specific

Bacteriophages are highly specific to different strains, even inside the same organism. So essentially you would need to determine to a high level what specific phage will work on the organism the patient has. This wasn’t really possible until recently (tbh I don’t know if it’s possible now but we’ve got cheap genetics so probably). You’d also need to have a fat library of phages sitting in reserve. So that’s a logistics issue. It’s also a bit unclear how they would work with systemic infections - it’s going to be antigenic injected into the bloodstream, most of my understanding of them is for topical applications which parallels the old eastern bloc experience - that’s still incredibly useful