The immunisation programme in Ireland is based on the advice of the National Immunisation Advisory Committee (NIAC). The Committee's recommendations are based on the prevalence of the relevant disease in Ireland and international best practices in relation to immunisation. It makes recommendations on vaccination policy to my Department.
The HSE has been advised to operationalise updated NIAC guidance in relation to the mixing of vaccines, specifically relating to certain people who are yet to complete a two-dose Covid-19 vaccine regimen.
The NIAC advice on heterologous vaccination relates to:
Individuals who have already had a first dose of Vaxzevria® (AstraZeneca) and who did not complete the vaccination schedule as recommended and have requested an mRNA second dose. If an mRNA vaccine is used as a second dose, it should be given after an interval of at least 28 days and the person should be considered fully vaccinated.
Those with a contraindication to one mRNA COVID-19 vaccine should not receive another authorised mRNA vaccine. Consideration may be given to non-mRNA vaccination for anyone 18 and older including pregnant women. This should be given after an interval of at least 28 days and the person should be considered fully vaccinated.
The definition of a vaccinated person is set out in S.I. No. 385 of 2021, which outlines the circumstances to be complied with in relation to indoor dining, and includes those who have had heterologous vaccination of specified vaccines. The National Public Health Emergency Team gave consideration to the issues arising for those persons who can't receive a Covid-19 vaccine for medical reasons as part of its discussion of 18 October on the continuing response to Covid-19 and the extension of the Covid Pass arrangements. The matter is being given further consideration.
