► Subscribe to FT.com here: http://on.ft.com/2eZZoLI<br /><br />Current data show more than 1.3m computer systems are still vulnerable to the WannaCry ransomware campaign, which has already seriously affected hospitals, disrupted transport networks and immobilised businesses, according to cyber security analysts.<br /><br />► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes
