coronavirus variants will likely mean booster vaccinations are needed later in the year after the second round of jabs is completed.During Prime Minister’s Questions in the Commons, Johnson said a 50 million dose deal with pharmaceutical firm Curevac will assist in developing vaccines to respond “at scale to new variants of the virus”.He told MPs: “We’re going to have to get used to vaccinating and then revaccinating in the autumn as we come to face these new variants.”Mutations that give the variants some resistance to existing vaccines have prompted a race to develop booster shots, much like the need to revaccinate annually against seasonal flu.Oxford University is working on a modified version of its vaccine that is more effective.