A quarter of staff at an ambulance station in north Belfast are off work due to coronavirus.
Thirteen out of 52 staff based in Ardoyne Ambulance Station are absent as a result of Covid-related issues.
A further four are off work on ordinary sickness absence, the ambulance service confirmed.
There have been concerns over absence levels affecting healthcare staff across the north amid efforts to tackle the pandemic.
But overall statistics on the number of health workers contracting coronavirus are not currently being collated.
The latest absence figures for Ardoyne Ambulance Station are as of Monday evening.
The Northern Ireland Ambulance Service (NIAS) told The Irish News it has put arrangements in place to test staff or their families who become symptomatic.
A spokesman said: "The level of absence changes on a daily basis as some staff become ready to return to work after a period of self-isolation and others begin a period of self-isolation.
"NIAS has put arrangements in place to test staff who become symptomatic or whose family members become symptomatic.
"These testing arrangements have helped staff who are self-isolating to return to work as soon as possible and also provides assurance to staff.
"NIAS appreciates the efforts of all staff at this particularly challenging time and will continue to provide the necessary support to ensure that our staff stay well and remain in a position to provide the adequate levels of cover to those who are in need of our service."
The spokesman said the public can help preserve NIAS resources by ensuring they only call 999 in "emergency situations".
"Anyone displaying early symptoms of Coronavirus should follow the well publicised advice of contacting NHS111, preferably online, and self-isolating," he said.
"For those who are well, the key message is to maintain social distancing at all times, avoiding unnecessary journeys.
"Calling an ambulance with symptoms of coronavirus – either a temperature and/or a new and continuous cough – is not appropriate and places our crews at risk, meaning they may not be available for real emergencies.
"However if you are experiencing symptoms of severe respiratory distress, or other serious medical illness, please do not hesitate to call 999."
The Public Health Agency said it was unable to provide statistics on the overall number of healthcare staff who have contracted coronavirus.
A spokesman said: "Currently this information is not collated, but as this is an emerging pandemic the systems used will constantly evolve and the complexity of the analysis will increase. This may form part of our data in the future."
