https://www.9news.com.au/national/optus-data-breach-cyber-security-expert-says-more-could-have-been-done-to-protect-information/89f12f22-d7d1-43c5-b040-89f9b9f2f638
<p>Thousands of Medicare card numbers have been exposed during as a result of the Optus data breach, the company has confirmed.</p>
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