Coronavirus UK: COVID-19 to become 'yearly virus' 60% Britons must build 'immunity' CORONAVIRUS is likely to become a "yearly" occurrence and Britons will only -- -- CORONAVIRUS is likely to become a "yearly" occurrence and Britons will only develop "herd immunity" if 60 percent of the population contracts COVID-19, Sir Patrick Vallance warned. -- -- Scientific Adviser Sir Patrick Vallance warned COVID-19 is likely to become a "seasonal virus" as he said the UK will only benefit from indirect protection, the so-called herd immunity, from the coronavirus if 60 percent of the population becomes infected. Asked how many -- if 60 percent of the population becomes infected. Asked how many Britons will need to get coronavirus before herd immunity comes into play, Sir Patrick said: "Probably about 60 percent or so. -- -- closures "60 percent is the sort of figure you need to get herd immunity. "We think this virus is likely to be one that comes back year on year, -- -- Patrick Vallance CSA Coronavirus covid 19 uk Patrick Vallance said 60 percent of Britons must get the virus for herd immunity to kick in (Image: SKY NEWS) "The second is, of course, protect the elderly and the vulnerable to -- -- make sure, during that peak, they are protected." Herd immunity is where the spread of a contagious disease is stopped due to a high proportion of individuals, but not necessarily all, becoming immune to the disease. -- -- Man accused of double murder for killing two women in 1987 coronavirus vaccine roll out immunity programme matt hancock Britain to begin fightback against COVID with 'biggest immunisation programme