LONDON – A new national consortium of virologists has been set up to systematically assess how mutations in SARS-CoV-2 affect key outcomes such as effectiveness of vaccines and therapies, transmissibility of the virus and the severity of COVID-19 infections. Now is the critical time to do this, as the level of both natural and vaccine-conferred immunity that might drive natural selection is increasing, said Wendy Barclay, head of the department of infectious disease at Imperial College London, who is leading the G2P-UK (Genotype to Phenotype-UK) project.