The Irish Nurses and Midwives Organisation want emergency childcare measures to be put in place for health workers.
It says members with children are worried they'll have to take time off work because of the extended school holidays.
The Union also wants hospital capacity from the private sector added to the public system again to avoid overwhelming staff.
General Secretary Phil Ní Sheaghdha says staff levels are already low because of high numbers of nurses getting sick with Covid-19:
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8:00pm - 1:00am
Relaxing favourites with Traic O'Braonain
Heavy rain shower
High: 10°C | Low: 5°C
Heavy rain shower
High: 11°C | Low: 6°C
Heavy rain shower
High: 11°C | Low: 5°C
Heavy rain shower
High: 9°C | Low: 4°C
Heavy rain shower
High: 10°C | Low: 5°C