People aged 12 to 49 with long-term health conditions and healthcare workers are being invited to make an appointment for their second Covid-19 booster dose.
Those who are aged over 50 and people who are more than 16 weeks pregnant are also invited to book their next booster at a HSE vaccination centre or from participating GPs and pharmacies.
Dr Colm Henry, HSE chief clinical officer, said: “We know that those who have long-term health conditions are at greater risk from serious illness from Covid-19.