A leading immunologist says the latest variant of Covid-19 transmits well, but there's no evidence to suggest it's any more severe.
Professor Paul Moynagh from Maynooth University says the X B B one-point-5 strain - a version of Omicron - is likely to spread here, as cases increase in the US.
Fewer than five cases of the new variant were detected in Ireland in the month leading up to Christmas according to the Health Protection Surveillance Centre.
