A telephone helpline has been set up in Northern Ireland for those who have travelled to countries worst hit by the coronavirus over the past fortnight.
The Public Health Agency (PHA) is urging anyone with concerns to contact the number.
It is not known how many people in the north have undergone testing for the virus as health authorities have taken a decision not to disclose information.
However, it has been reported that a mother and baby who recently returned from Hong Kong were screened in Derry's Altanagelvin hospital last week. An adult was also tested in Daisy Hill Hospital in Newry last Friday evening.
There have been no confirmed cases to date on the island.
The Republic's National Public Health Emergency Team is meeting each week to review the situation, with RTÉ reporting that tests have been carried out on more than 30 suspected cases.
In a statement, the PHA said it is "not providing a running commentary on numbers of suspected cases in Northern Ireland".
"We will not be commenting on numbers of people being screened, and we cannot comment on any individual cases," the agency said.
It said anyone who has travelled to China, Thailand, Japan, Republic of Korea, Hong Kong, Taiwan, Singapore, Malaysia and Macau in the past 14 days can contact the helpline number on 0300 200 7885.
"Should a case be diagnosed in Northern Ireland, this will be confirmed publicly. This is an evolving situation and we will provide updates and further guidance as required," the PHA added.
There have now been more than 40,000 cases of coronavirus worldwide, which has been declared a global health emergency. The death toll in China has topped 1,000.
On Monday, the British government issued new powers in England to keep people in quarantine to stop the virus spreading.
