Additional booster vaccines against the coronavirus will be needed in the future, said a leading British scientist who is studying the virus. A booster is an extra shot that increases or renews the effect of an earlier vaccine. Boosters will be needed because the coronavirus continues to change, or mutate. Sharon Peacock is the head of COVID-19 Genomics UK, COG-UK. She said countries must work together in their fight against the virus. “We were always going to have to have booster doses; immunity to coronavirus doesn’t last forever,” Peacock told Reuters. She added that scientists were already changing the vaccine to fight virus variants as they are found. Peacock, a professor at Britain’s Cambridge University, said she was sure that regular booster shots would be needed to deal with future variants.