(Richard Drew | AP photo) Yale University researcher Benjamin Chan, who studies viruses that attack bacteria, holds a petri dish containing Pseudomonas aeruginosa lung samples grown from patient Ella Balasa, at Osborne Memorial Laboratories, in New Haven, Conn., Thursday Jan. 17, 2019. Pitting one germ against another may sound radical, but it’s a sign of a growing global crisis. Increasingly people are dying of infections that once were easy to treat, as common bacteria evolve to resist drugs that form the foundation of modern medicine.