The European Medicines Agency is expected to reaffirm the safety of the AstraZeneca vaccine this afternoon.
Eleven EU countries, including Ireland, paused the administration of the jab after reports of blood clots in a small number of vaccinated people.
Thousands of people who were due to be inoculated this week had their appointments cancelled as a result.
Immunology Professor with Trinity College Dublin, Luke O'Neill, says the EMA may confirm there is a small risk of blood clots:
"Lots of organisations have come out and said keep using the vaccine; COVAX is the latest for example. They're giving hundreds of thousands of doses in the developing world.
"So everybody says the benefit far outweigh the risk. They might say look there is a risk of this but it's tiny and so small that that doesn't justify not using the vaccine."