UnitedHealth has revealed that 190 million Americans had their personal and healthcare data stolen in the Change Healthcare ransomware attack, nearly doubling the previously disclosed figure.

About 190 million Americans may have been affected by a cyberattack targeting UnitedHealth‘s subsidiary, Change Healthcare. The breach, which disrupted the company’s IT systems, resulted in the compromise of sensitive personal and medical information.

Bleeping Computer on Wednesday also reported that an extortion note the attacker sent to PowerSchool claimed that the personal data of 62.4 million students and 9.5 million teachers was swept up in the breach. PowerSchool said it’s offering two years of free credit monitoring to all those affected.

The hack has the potential to be one of the biggest of the year, but the edtech giant is refusing to answer important questions

PowerSchool, a widely used platform among districts in western Washington, including Seattle and Everett, confirmed the breach.

Over 60 million students & teachers data may have been stolen in PowerSchool breach

Professor noted the need for continued pushes for multi-factor authentication for educational services that require such extensive identifying information.