The HSE is warning of significant disruption and service delays in hospitals today due to a planned strike by medical scientists.
The health service says the industrial action will lead to the cancellation of many inpatient and day-case elective procedures as well as hospital outpatient appointments.
All routine GP testing services have also been suspended because of the pay dispute.
Pickets are taking place across the country this afternoon, including outside Our Lady’s Hospital in Navan
Sinn Féin TD’s Darren O’Rourke and Johnny Guirke joined the picket line in Navan