By: Mack Jackson Jr. Hospital computer systems across five states have recently been hit by a significant cyberattack, causing widespread disruption to healthcare services. The attack targeted facilities operated by Prospect Medical Holdings, a chain that owns hospitals and more than 165 outpatient facilities in California, Connecticut, Pennsylvania, Rhode Island, and Texas. The cyberattack is the largest on a U.S. hospital system since last year and the 157th cyberattack on a U.S. healthcare organization this year.