Influenza infection (flu) is a major cause of death around the world. People who die of the flu often have a secondary lung infection with Staphylococcus aureus (staph) bacteria that starts a few days after flu infection begins. A team studied how the flu paves the way for staph infection in the lungs. The researchers found that healthy lungs secrete liquid into their air sacs that prevents a staph infection. The flu blocks this liquid secretion by inhibiting a protein called CFTR, making it possible for staph that are inhaled into the air sacs to stick to the air sac...