Public Health Wales provides an acute response service 24 hours a day, 365 days per year for both communicable disease and environmental incidents.
Rhaid i adrannau achosion brys mawr ddarparu gwasanaethau dadebru, asesu a thrin salwch acíwt ac anafiadau i gleifion o bob oed, a rhaid i wasanaethau fod ar gael 24 awr y dydd yn ddi-dor.