Ireland may have to cope with repeated waves of Covid-19 epidemics until a large enough proportion of the population is infected to provide possible herd immunity, new research warns. But does that mean we have to stay locked down indefinitely, or is there a different strategy that can allow us to manage the disease? Dr Rosalyn Moran is an Irish scientist based in London who led the research team. She talks to Irish Times deputy editor Deirdre Veldon.