For the average person, having a bacterial cornucopia on your phone probably isn't that big a deal. But in a hospital, bacterial transmission is a huge problem. Antibiotic-resistant bacteria, which are on the rise, can infect patients with immune systems that are already compromised; hospital-acquired infection is one of the leading causes of death in hospitals. If a doctor is checking her phone in the room of an infected patient, then goes to check on another patient with a compromised immune system, she might have unwittingly transmitted the infection. Current hygiene standards require physicians to wipe down their phones with alcohol before leaving each patient's room, but no one is certain that these alcohol wipes are as effective as they need to be.