Cook County Health Patients Affected by Cyberattack at Medical Transcription Firm. Cook County Health, which operates John H. Stroger, Jr. Hospital and Provident Hospital in Chicago, IL, has been informed by one of its business Cook County Health is awaiting confirmation on the patients affected by an April 2023 cyberattack at its business associate. Unauthorized individuals had access to the network of AIDS Alabama for 10 months. PJ&A provides medical transcription services to Cook County Health and has access to patients’ protected health information. PJ&A notified Cook County Health on July 21, 2023, that it was investigating a cyberattack, and confirmed on July 26, 2023, that the personal information of Cook County Health patients was stored on the compromised parts of its network. The forensic investigation confirmed that an unauthorized third party accessed the systems where patient data was stored in April 2023. Third-party company: Perry Johnson & Associates, Inc., (PJ&A).