This is a new and expanded view of the tree of life. The tree of life, which depicts how life has evolved and diversified on the planet, is getting a lot more complicated.

Despite having policies in place to prevent infections, staff at outpatient care facilities fail to follow recommendations for hand hygiene 37 percent of the time, and for safe injection practices 33 percent of the time, according to a study published in the April issue of the American Journal of Infection Control, the official publication of the Association for Professionals in Infection Control and Epidemiology (APIC).