NSW Chief Health Officer Kerry Chant last week said getting a flu shot was just as important as being vaccinated for COVID-19 as flu cases spike with international borders re-opening after two years.
Cases of flu in NSW have more than doubled in recent weeks to 1024.
"This year, with both COVID and flu, we need to do all we can to protect ourselves and protect other people, and that will also reduce the burden on our hospitals and healthcare providers," Dr Chant said.
NSW Seniors Minister Mark Coure said people aged 65 and older could get a free flu shot at pharmacies and GPs.
He stressed it was particularly important for anyone who was immunocompromised or living with someone who was susceptible to serious illness from flu.
"We have come a long way and have a strong COVID-19 vaccination rate, but it is important to take any additional steps we can to protect ourselves and others as we head into the winter months," Mr Coure said on Monday.
The flu shot and COVID-19 booster can be given at the same time.
LATEST 24-HOUR COVID-19 DATA:
NSW: 7793 new cases, three deaths, 1548 in hospital with 54 in ICU
Victoria: 10,031 cases, no deaths, 491 in hospital with 43 in ICU.