A double round of strikes will impact the NHS in Oxfordshire from today until Saturday.
NHS consultants are on strike across England for two days in a dispute over pay.
And from Wednesday they will be joined by junior doctors in the first joint strike in the history of the NHS.
The organisation that runs Oxfordshire's health services NHS Buckinghamshire Oxfordshire and Berkshire West Integrated Care Board said emergency treatment, critical care, neonatal care, maternity, and trauma are being prioritised.
The strikes will affect planned and routine services but patients who have a scheduled appointment should attend as planned unless they hear from the NHS directly that the appointment has been changed.
Dr Nick Broughton, interim chief executive of the NHS BOB ICB, said it would affect patients and staff who are still working.
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He said: "NHS staff working during the industrial action will be working hard in hospitals, community teams, GP services and pharmacies to keep people safe and respond to their needs.
"NHS staff are working very hard during a very challenging time – please do treat them with respect. We appreciate people's understanding and co-operation during this time.
"We are grateful to all our colleagues working during this time to keep services running and patients safe.”
He told Radio Oxford: "Patients are waiting longer for their procedures. Patients will be suffering harm as a consequence which is incredibly concerning.
"It also means that our colleagues who are covering industrial action are working longer hours."
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