Glynn warns that St Patrick's Day must be 'a quiet one' as virus surges again across Europe Health official warns against socialising on St Patrick's Day, while immunity expert explains why AstraZeneca jab was suspended Deputy chief medical officer, Ronan Glynn, said vaccines alone will not stop another wave of Covid-19, and people should continue to curb all social contact. Picture: Sasko Lazarov/RollingNews Tue, 16 Mar, 2021 - 06:30 Niamh Griffin, Health Correspondent The Government's senior health advisers have warned of a fourth wave of Covid-19, as it was revealed that 'very particular' clustering of blood clots led to the suspension of the AstraZeneca vaccine.