A further five people have died as a result of COVID-19, the Department of Health has said.
New figures indicated that the death toll in Northern Ireland has now risen to 494.
Eighteen new positive cases have been reported.
Four of the deaths occurred within the past 24 hours, and one outside of this time period.
Meanwhile, Northern Ireland’s contact tracing programme is continuing to expand, with all positive cases of COVID-19 now being traced.
Health Minister Robin Swann said he welcomed the roll out of this contact tracing.
“This is another example of the herculean work right across the HSC system to fight back against COVID-19 and keep people safe.
“The battle against the virus is a long-term challenge and contact tracing will have a very important role as part of that.”
Dr Jackie Hyland, Consultant in Health Protection at the PHA, said contact tracing on COVID-19 at this stage involves new ways of working, given the scale and the fact that new evidence is continually emerging about the illness.
“We are now rolling out contact tracing further and working with the public to support people who may have been exposed so they can get tested and self-isolate to help prevent spread of infection.
“We are progressing our plans for scaling up the second phase of the Northern Ireland contact tracing service, informed by the learning from the current pilot programme. This work involves testing all aspects of the programme, including processes and resilience,” she said.
Dr Hyland said testing is also now available to everyone in Northern Ireland aged over five with symptoms, and this will form an important part of the contact tracing programme.
The Department of Health is also taking forward work around digital solutions that can support the wider contact tracing programme when it goes live.
Contact tracing means identifying people who have been in close contact with someone who has tested positive for COVID-19, informing them of this, and providing them with information on the symptoms to be aware of, what to do if symptoms develop, and if they need to self-isolate or get tested.
Dr Hyland added: “Contact tracing will allow the health service to identify those at risk of exposure and put the appropriate plans in place to help prevent further spread of COVID-19. It is a fundamental, tried and tested part of outbreak control that’s used by public health professionals around the world.
“Successful contact tracing relies on every person in Northern Ireland understanding what to do if they develop symptoms, and being prepared to follow the public health advice.
“People are asked to be aware that they may be phoned by the PHA contact tracing staff. We will talk to people with a positive test about their infection and we will ask them if there are people they have been close to who may be at risk of becoming ill (their contacts).
“A contact tracing team member will then phone these contacts and talk to them about their risk of infection. Everyone who has the infection and who is a close contact will have to self-isolate. To be successful in contact tracing we need people to provide their phone number when they get a test.”
As part of the scaling up of contact tracing, there will be a public information programme to keep people aware of the processes involved and any actions they should take.
Testing and contact tracing will only have an impact on reducing transmission in the community if individuals self-isolate when required. Self-isolating can be very difficult for people, so the health service is working together with volunteers and departments to try to ensure that appropriate support is available.