Virologist Dr Cillian de Gascun on how Covid-19 vaccines work

Ireland could start its rollout of a Covid vaccine as soon as next month, but how exactly do they work? We're joined on this week's episode by head of the National Virus Reference Laboratory and NPHET member Dr Cillian De Gascun. We examine the main differences between the leading vaccine candidates, why mRNA could be a significant gamechanger in medicine, and more.