Yes, but you can't rely on that on a natural setting. Sometimes the body does get rid of a disease, right? Same thing with bacteria-phage relationship - and the

Yes, but you can't rely on that on a natural setting. Sometimes the body does get rid of a disease, right? Same thing with bacteria-phage relationship - and the resistant bacteria can then spread (while the better phages are difficult to harvest back from the body, and may not be as effective against the original strain). I think a more personalized medical system can do a lot of good with phages given modern tech, but most medical provision systems would have difficultly deploying it, and certainly no one was able to back when it was developed. AFAIK, the ability to easily scale, transport and deploy antibiotics was what led to antibiotics being chosen over phages just about everywhere.