Anyone over 50 can get a free flu vaccine this winter.
Health Minister Stephen Donnelly says the programme has been extended to the 50 to 64 age group.
The vaccine is usually free for all children and people aged over 65.
However, Minister Donnelly says he doesn't want flu to compound the winter pressures on the health system given the COVID-19 situation.
He said: "By making the seasonal flu vaccine available free of charge to all adults aged 50-64, we are helping to protect you against flu and to reduce its spread in the community.
"This extension, which is in line with NIAC recommendations, is intended to further limit demands on health services for flu related illnesses over the winter months."
The vaccine will be available at GPs and pharmacies, and can be given at the same time as a COVID-19 vaccine booster.
The flu vaccine is also available free of charge to pregnant women, healthcare workers, nursing home residents and people with many serious health conditions.
Some politicians had called for free flu jabs for everyone this winter - with one Fine Gael senator saying charging for the vaccine should be "eliminated" entirely.