The Change Healthcare ransomware attack has impacted the personal information of 100 million US citizens, updated figures from the US Department of Health and Human Services (HHS) have revealed.
The figure means the attack, which began in February 2024, is the largest known data breach of US healthcare records ever recorded.
The HHS Office for Civil Rights (OCR) said that Change Healthcare informed it on October 22 that approximately 100 million individual data breach notices have been sent regarding the incident.
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