At Least 750 US Hospitals Faced Disruptions During Last Year's CrowdStrike Outage, Study Finds

At least 759 US hospitals experienced network disruptions during the CrowdStrike outage on July 19, 2024, with more than 200 suffering outages that directly affected patient care services, according to a study published in JAMA Network Open by UC San Diego researchers. The researchers detected disruptions across 34% of the 2,232 hospital networks they scanned, finding outages in health records systems, fetal monitoring equipment, medical imaging storage, and patient transfer platforms.

Most services recovered within six hours, though some remained offline for more than 48 hours. CrowdStrike dismissed the study as 'junk science,' arguing the researchers failed to verify whether affected networks actually ran CrowdStrike software. The researchers defended their methodology, noting they could scan only about one-third of America's hospitals, suggesting the actual impact may have been significantly larger.

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