OXFORD hospitals are "remaining vigilant" after the cyber attack hit the NHS and businesses across the world.
"The IT industry is prepared for any such attacks, and it is less vulnerable, as generally IT companies choose the latest software, and update security patches", said Nasscom President R Chandrasekhar, adding that if you take other normal organisations, they should now start looking at cyber security as an important and essential feature.
"Ooops, your files have been encrypted!"".
But experts and government alike warn against ceding to the hackers' demands.
The virus swept across the NHS on Friday, holding computers to ransom for $300 worth of online currency Bitcoin, threatening to delete files if the payment was not made.
Experts and officials offered differing estimates of the scope of the attacks, but all agreed it was huge.
"WannaCry" first surfaced at 3:24 a.m. ET on Friday, according to Talos, a security research wing of networking giant Cisco.
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French police said there were "more than 75,000 victims" around the globe, but cautioned that the number could increase "significantly".
Microsoft said the situation was "painful" and that it was taking "all possible actions to protect our customers".
The health service has been criticised for using the outdated Windows XP operating system to store digital information, despite security updates for the software having been discontinued by Microsoft.
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The US Senate Intelligence Committee is monitoring the attack and expects to receive a briefing in the coming days from the Trump administration, a panel aide said. "Nevertheless, one should never pay the ransom as it will encourage attackers", said Kiran Deshpande, Co-founder and President of Mojo Networks.
Germany's Deutsche Bahn computers were also impacted, with the company reporting on Saturday morning that display panels in the stations were affected. Universities in Greece and Italy also were hit.
The healthcare system in the United Kingdom is reeling from a ransomware attack.
British media were hailing as a hero a 22-year-old computer security whiz who appeared to have helped stop the attack from spreading by discovering a "kill switch" - an internet address which halted the virus when activated.
The NHS, which was showcased in the opening ceremony of the 2012 Olympic Games, employs more than 1.5 million people, making it the world's fifth biggest employer after the USA and Chinese militaries, Walmart and McDonald's.
"It's a malicious software programme that's used, either by an individual or by an organised criminal group, to extort money from an affected user", says Amit Nath, Head of Asia Pacific - Corporate Business, at F-Secure Corporation. "Now I should probably sleep".
China is also set to implement a tougher new cyber security law from June 1, created to strengthen critical infrastructure, even as many global tech firms and lobbies say that its cyber rules skew the playing field against foreign firms.
Although the virus's spread was curbed over the weekend in most of the world, France, where carmaker Renault was among the world's highest profile victims, said more attacks were likely.
G7 finance ministers meeting in Italy vowed to unite against cyber crime, as it represented a growing threat to their economies and should be tackled as a priority.
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The Health Secretary Jeremy Hunt was warned previous year about NHS' vulnerability to attack.