A quick recap on which firms were affected by Friday's attack - they include Germany's rail network Deutsche Bahn, Spanish telecommunications operator Telefonica, US logistics giant FedEx and Chinese energy giant PetroChina.  

French carmaker Renault, as well as Japanese firms Nissan and Hitachi reported some units had been affected, but the effects had been small.

BBC News Channel

Health Secretary Jeremy Hunt has come under pressure for not speaking about the global cyber-attack which disrupted hospitals and GP surgeries across England and Scotland.

In his first interview since the attacks, Mr Hunt told the BBC that UK intelligence services had found no evidence of a second wave of disruption.

He added: "The level of criminal activity is at the lower end of the range we had anticipated. I think that is encouraging."

The UK's National Crime Agency has just said so far there has been no evidence of a much feared second round of cyber attacks.

There had been concerns of a second wave as employees turned on their computers and checked e-mails as they returned to work on Monday. 

"We haven't seen a second spike in #WannaCry #ransomware attacks, but that doesn't mean there won't be one," tweeted the NCA.

Image source, Getty Images

People around the world are now trying to track down the hackers behind the ransomware attack. 

Virtual currency Bitcoin could be a way to trace them, according to the UN's head of global cyber-crime Neil Walsh:

"In the past month alone we have trained investigators and prosecutors in over 40 countries on how to investigate Bitcoin transactions and how to link those transactions to find an individual or entity. 

 "So, that is the risk (for the hackers) if they start to get payments coming back. It gives us opportunities to investigate and identify." 

However BBC analysis of three accounts linked to the ransom demands suggests only about $38,000 (£29,400) had been paid by Monday morning.

BBC research has found that the NHS trusts in England still affected by Friday's cyber attack include:

• Barts Health NHS Trust 
• Colchester University Hospital NHS Trust 
• East & North Hertfordshire NHS Trust 
• George Eliot Hospital NHS Trust 
• Hampshire Hospitals NHS Trust 
• James Paget Hospital NHS Trust 
• Lancashire Teaching Hospitals NHS Trust

• Mid Essex Hospital NHS Trust 

• North Cumbria University Hospitals NHS Trust 
• Southport and Ormskirk Hospital NHS Trust 
• United Lincolnshire Hospitals NHS Trust 
• York Teaching Hospitals NHS Trust 

Image source, AFP

Russian President Vladimir Putin has said it wasn't responsible for the global ransomware attack. Russia, which is known for its hacking capabilities, was among the worst-affected countries, according to cyber experts.

Image source, PA

The UK government will hold an emergency Cobra meeting this afternoon about the cyber attack, which counted the NHS as one of its major victims. 

Home Secretary Amber Rudd will chair the meeting, and Health Secretary Jeremy Hunt, who has yet to speak publicly about the incident, will be among those attending.

A spokesman for Number 10 said: "It is much as it was at the moment but we've also said this is a very complex issue and we need to keep abreast of what's happening."

Seven NHS trusts out of nearly 50 that were hit are still facing serious issues, although others are also reporting problems. Patients have been told to turn up for appointments, unless advised otherwise.    

Image source, AFP

While Asia has not escaped the impact of the WannaCry ransomware, investors largely brushed aside jitters about the global cyber-attack.

Japan's Nikkei index finished marginally lower, although analysts put that partly down to a different sort of threat - the claim from North Korea that it had carried out a successful test of a new type of "ballistic rocket". The Nikkei 225 index lost 0.1%, or 14 points, to end at 19,869.9.

And one firm which did report some disruption to its IT systems, Hitachi, actually had a great day on the markets, adding 5% after a strong earnings outlook.

The Hang Seng index in Hong Kong finished 0.9% higher at 25,371.59, while the Shanghai Composite rose 0.2% to 3,090.23.

BBC Radio Lincolnshire

Patients in Lincolnshire are being advised not to visit their GP unless it is an emergency.

Computers in GP surgeries are currently shut down, and there's no access to files, prescriptions or blood test results across the county, the director of the Lincolnshire Medical Committee told the BBC.

Lincolnshire's hospitals have also cancelled some treatments. The United Lincolnshire Hospitals NHS Trust, external said:

Image source, webroot

What do you do if the ransomware arrives on your computer?

Should you just pay the ransom?

The most crucial bit of advice from most experts is: No.

Read more here.

BBC Monitoring
News from around the globe

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Russian President Vladimir Putin says ransomware used in recent cyber-attacks was a "genie" let out of the bottle by US special services.

He made the comments at a news conference on a visit to China on Monday.

The National Crime Agency has a simple message for those affected by Friday's cyber-attack:

Image source, AFP

Business Live has been focusing this morning on the ransomware attack - which has hit thousands of companies and institutions around the world. 

For regular readers of these pages, here are some of the other big business stories out there today:

• The FTSE 100 index has hit fresh record highs, boosted by rising oil prices. The UK's benchmark share index touched 7,458 points, before easing back to 7,444 points at 10.00 UK time. 
• A survey has found that UK businesses believe pay rises will be just 1% this year - the lowest level for three years. Inflation is currently running at more than 2%, leading to a squeeze for consumers.
• Troubled Japanese conglomerate Toshiba has missed a deadline to file its annual results. The firm warned it was likely to report a loss of 950bn yen ($8.4bn; £6.5bn).  

Michelle Roberts
Health editor, BBC News online

Image source, Getty Images

Health secretary Jeremy Hunt was warned last summer that NHS organisations were at risk of cyber attacks.

The national data guardian Dame Fiona Caldicott and the Care Quality Commission assessed the cybersecurity of 60 hospitals, GP surgeries and dental practices at the request of Mr Hunt.

They said the external cyber threat was becoming a “bigger consideration” as the NHS switched from paper to digital medical records and systems.

They warned of increasing numbers of unsolicited emails containing "malware" or hidden software, designed to cause harm, in global circulation.

Their report last July made a number of recommendations, including the advice that “computer hardware and software that can no longer be supported should be replaced as a matter of urgency”.

The WannaCry computer virus that hit the NHS infects machines running Windows operating systems.

It appears some hospitals were still using outdated systems.

The government told NHS trusts in 2014 that they needed to move away from Windows XP as rapidly as possible.

Image source, Getty Images

French car maker Renault that had to halt production at many factories to shield it from the ransomware outbreak, has explained that things are returning to normal. 

The firm said that 90% of its factories were now running again.

A cybersecurity researcher, who "accidentally" halted the spread of the malicious ransomware (see post at 07.44), has been reported by some media outlets as wishing to remain anonymous for fear of his safety. He's now taken to Twitter to set the record straight... 

Image source, AFP/Getty Images

BBC World has rounded up some of the worst-affected institutions by the global ransomware attack - with new cases still emerging.

Governments, hospitals and major companies have all found themselves battling the malware, which demands money in return for unfreezing computers.  

Russia 'hardest hit' - The virus tried to infect more computers in Russia than anywhere else, according to an analysis by Kaspersky Lab, a Russian antivirus company.

China agencies - Computers at nearly 30,000 institutions and organisations were affected, including government agencies and hospitals, internet firm Qihoo 360 said.

NHS England and Scotland - Dozens of NHS trusts reported problems at hospitals, doctor surgeries or pharmacies. Patients are advised to check the NHS choices website to see if their local services are affected.

Indonesia hospital - The communication and information ministry said the malware locked patient files on computers at two hospitals in the capital Jakarta.  

German railways - Electronic boards at stations announcing arrivals and departures were affected, but train services were not disrupted, Deutsche Bahn said.

Image source, Reuters

When news of the global ransomware attack first broke on Friday, it wasn't clear how many computers had been affected in the world's most populous country.

China's state agency Xinhua is now reporting that over 29,000 instutions were hit by the attack, citing a Chinese security-software company. 

"Hundreds of thousands" of Chinese computers at bodies including hospitals, ATMs and private companies were infected as of late Saturday, according to Qihoo 360.

It gave few details on the extent of any damage, however, and China's government has said little about the situation.