CHICAGO — Details of an apparent cyberattack on one of the largest health systems in the U.S. were slow to emerge as security experts on Friday warned that it often takes time to assess the full impact on patients and hospitals.
Earlier this week, CommonSpirit Health confirmed it experienced an “IT security issue” but it has yet to answer detailed questions about the incident, including how many of its 1,000 care sites that serve 20 million Americans may have been affected. The health system giant, which is the second largest nonprofit health system in America, has 140 hospitals in 21 states.