Hi cmi,
We have been studying bacteriophages as a potentially valuable therapeutic agent. Bacteriophages or phages - as they are commonly known - are not new. You can read about their history and current research in the attached papers.
The University of California San Diego's School of Medicine has a Center for Innovative Phage Applications and Therapeutics (https://medschool.ucsd.edu/som/medicine/divisions/idgph/research/center-innovative-phage-applications-and-therapeutics/Pages/default.aspx).
It is worth noting also that there is at least a pharmaceutical corporation (https://www.armatapharma.com/) actively developing products in this field. (I disclose that I don't have any connection with such company).
Regards,
Armando