A global cyberattack using hacking tools believed to have been created by the US National Security Agency has infected tens of thousands of computers in nearly 100 countries.

Russia was the worst hit, followed by Ukraine, India and Taiwan.

Victims of the Ransomware cyberattack face a $300 demand to unlock their data.

In the UK, the country’s National Health Service has had major problems.

Al Jazeera’s Neave Barker reports

United Kingdom