Norovirus, one of the most common causes of gastroenteritis, is currently on the increase in Ireland, the HSE has warned.
Symptoms of the nasty bug include vomiting and diarrhea.
There are concerns that this could lead to an increase in demand on healthcare facilities and staff.
The HSE says this period of higher levels of norovirus could continue for some weeks.
"Norovirus levels are usually high between December and April, but there has been an unseasonal increase in the last few weeks that has also been seen in Europe and the US," according to the HSE.
Outbreaks of the virus have previously led to restrictions on visiting in hospitals, particularly during winter months.
It's not always possible to avoid getting norovirus according to the HSE, but it says following the advice below can help stop the virus spreading.
See more information on symptoms, treatment and prevention of norovirus here
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