system
Given the following post, respond as if you're commenting on Reddit:
human
Why hasn’t bacteriophage therapy become commonplace yet?

I feel like it’s a discovery on par with something as revolutionary as solar power, but I rarely hear about it ever on the news. With its ability to potentially end the antibiotic resistance crisis, why hasn’t this potentially game changing treatment taken off?
gpt
1. Phage therapy works best with immunocompromised people because they won't mount an immune response against the phage.

2. Phages are not only specific to the species, but also the strain/isolate.

3. We're not at the point where we understand which page works best with which bacteria and why, so designing our own phages is not possible at this point. Therefore we have to find and screen from the environment and make a phage library. Then when there is a resistant infection, the isolates have to be screened against the phage library and hope that it works.

4. Personalized medicine is expensive and available to the lucky.