Hot off the presses – the next chapter in how filamentous phage affect bacterial infections in people. We report that Pf phage are associated with antibiotic resistance and poor outcomes in Cystic Fibrosis (CF) lung infections. These findings build on our previous report that filamentous phage serve as structural elements in biofilms and can prevent diffusion of some antibiotics (see PMID:26567508). Congratulations to Liz, Carlos Milla, and our collaborators Pat Secor, Rasmus Marvig, Helle Johansen, Elio Rossi, Søren Molin and everyone in the Bollyky Lab and the Stanford CF Center who made this happen. Check it out here: DOI: 10.1126/scitranslmed.aau9748