Mullingar's Kingston Mills says Ireland should be availing of the practice.
Mixing Covid-19 vaccines can have a "huge benefit" in boosting immunity, according to a leading immunologist.
The National Immunisation Advisory Committee is due to update its advice on mixing vaccines in the next two weeks, as it awaits further evidence to support the practice.
Professor of Immunology at Trinity College Dublin and Mullingar's Kingston Mills believes people who've been administered one shot of the AstraZeneca vaccine should receive the Pfizer jab in their second dose:
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