Regular antibiotics are becoming less effective because bacteria learn to fight them off, but special germ-fighting peptides seem to work in a different way and might help treat infections that regular medicines can't beat anymore.

The study looks at peptide antibiotics that have been approved by the FDA and shows they're being developed for infections. This generally supports using peptides for drug-resistant infections, but it doesn't test whether bacteria's resistance to regular antibiotics works against peptide antibiotics.