Researchers from the Hebrew University of Jerusalem have discovered that some bacteria enter a “disrupted” state when attacked but not destroyed by antibiotics. A different chemical is then needed to “finish them off”, otherwise they can eventually recover and reproduce. See also here.

https://www.timesofisrael.com/israeli-lab-finds-out-why-some-germs-dodge-drugs-opening-door-to-life-saving-fix/

https://drive.google.com/drive/folders/1MXRVJqbhN7-Zcm8j_WLZJkjqvgSUTvRG