Poultry farmers are being asked to get the seasonal flu vaccine to prevent the mix of bird flu and human flu.
The HSE says there's a risk if they get both of "viral reassortment," which is a potential risk of viruses swapping genetic material.
There are detections of bird flu in turkey flocks in Counties Carlow and Meath which are being culled.
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HSE Director of National Health Protection, Dr Éamonn O'Moore says if both flus mixed, it could be a problem:
