Accident and emergency units in England were almost back to normal yesterday, the National Health Service (NHS) said, after the last restrictions put in place following the global cyber attack were lifted.
On Friday afternoon, a number of NHS digital systems throughout the United Kingdom, were attacked by ransomware.
Darien Huss, a senior security research engineer at Proofpoint, warned that "a new attack" was a major concern following the first cyber assault.
The spread of the program across National Health Service (NHS) computers forced doctors to switch to pen and paper and continued to affect care days after it initially hit.
OXFORD hospitals are "remaining vigilant" after the cyber attack hit the NHS and businesses across the world.
Digital managers in Britain had been bracing themselves Monday for a possible second cyber attack, but in the event there was no new attack. "All services are operating as normal".
On Friday, May 12, 2017, a damaging ransomware attack swept across more than one hundred countries and infected tens of thousands of computers.
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The ransomware program demanded a payment worth £230 to unlock the affected computers.
"Again, any patient with a hospital appointment should attend as normal".
When the computer virus struck on Friday 47 trusts were affected and seven had to close their doors in A&E to ambulances. Not that ransomware attacks tend to be the subject of reporting - there is quite a high rate of payment of affected users as the pricing is deliberately cheaper than most alternatives unless your back-up process is very good.
"Patients should continue to attend and contact their GP Practice in the usual way".
"Our pro-active routine maintenance and planned security and anti-virus update programme, coupled with the county-wide Internet Security Filter has protected us". The bug prevented staff from accessing computer systems and warned that files would be deleted unless money was paid.
The PM's spokesman said Government officials were meeting during the day to guide the response to the attack, and added he was not aware of any additional problems coming to light as staff returned to work.