(Reuters) -A ransomware attack that encrypted certain elements of dialysis firm DaVita’s network impacted 2.7 million people, the U.S. health department’s website showed on Thursday.

The firm had disclosed in April that it was hit by a cyberattack. At the time, it said it would continue to provide patient care as it took measures to restore certain functions, but it could not “estimate the duration or extent of the disruption.”

DaVita provides dialysis, a treatment which mechanically cleans a patient’s blood when their kidneys are not functioning properly, through its network of nearly 3,000 outpatient clinics and at-home services.

It did not immediately respond to a Reuters request for comment.

The cybersecurity incident had resulted in a temporary disruption of the company’s operatio

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