People with compromised immune systems are set to be the first to get a Covid-19 booster jab.
The additional dose will be offered to qualifying people over the age of 12, no earlier than two months after their second dose.
Advice on vaccination during pregnancy has also been updated, with women now allowed to get the jab before 14 weeks.
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The National Immunisation Advisory Committee says people with compromised immune systems should get an additional dose of an mRNA jab, regardless of what vaccine they originally received.
Kingston Mills, Professor of Experimental Immunology at Trinity College, says these boosters will be suitable for anyone who's already been vaccinated.
