The crisis of antibiotic resistance represents a global public health challenge, affecting particularly patients with respiratory infections. The use of (bacterio)phages for the treatment of bacterial infections (phage therapy) seems safe but its effectiveness has not yet been proven by controlled clinical trials. Nevertheless, phage therapy is regaining interest, encouraged by published cases treated successfully with personalized phage combinations as well as significant advances at a preclinical level. Standardized approaches in phage production and treatment administration, as well as future translational studies, are needed to improve our understanding and explore the potential of phage therapy.