Junior doctors in England have gone on a three-day strike to demand better pay.
This has caused widespread disruption to operations and appointments at NHS hospitals and health clinics, affecting thousands of patients.
Senior doctors and other medics have been called in to cover emergency, critical care, and maternity services.
The British Medical Association (BMA), the doctors' trade union, says that pay for junior doctors has decreased by 26% since 2008.
The union claims burnout and the UK's cost-of-living crisis are causing experienced doctors to leave the public health service.
The strike by junior doctors across England, starting on Monday, aims to counteract the 26% pay reduction since 2008, resulting in burnout and many experienced doctors leaving the National Health Service (NHS).
Although the walkout lasts only 72 hours, it affects hospital systems throughout England, disrupting tens of thousands of outpatient appointments and operations.
The British Medical Association (BMA) claims that the pay cuts and increased workload are pushing doctors to work abroad or reduce their working hours.
NHS trusts have postponed many more procedures for this strike than in previous walkouts by ambulance staff or nurses.
The union has urged the government to negotiate instead of calling off the action, with several adverts citing "a newly qualified doctor earned less than some coffee shop staff."