It can be walk-in or appointment.
Covid vaccine booster doses are being made available to those aged 30 to 39 from today.
While those aged 16 to 29 who received a one dose Johnson and Johnson jab are also eligible for a booster.
It must be three months since the person received their primary vaccine or since a positive covid test result.
People aged 30-39 will be offered a single dose of either a Pfizer or Moderna vaccine.
That's even if they got a different type vaccine the first time round.
Details of times and locations of walk-in centres are available here.
Alternatively, people can also book a booster appointment online at some HSE vaccination clinics.
Or get their booster from their GP or a participating pharmacy.
For the booster jab, you should have your PPS number handy and photo ID.
You'll also need to have waited three months since your original vaccine, so have this date to hand too.
People aged 40 and over will also be accommodated at walk-in clinics.
Yesterday, registration also opened for parents of high risk children aged 5-11 to get their covid jab.