LOS ANGELES : Scientists have discovered a common feature found in many of the human antibodies that neutralise the novel coronavirus, a finding which they say can aid successful vaccine development against COVID-19.While multiple vaccine candidates have entered clinical trials, the researchers, including those from the Scripps Research Institute in the US, said the features of human antibodies which contribute to the most effective immune response against the novel coronavirus -- SARS-CoV-2 -- remain unclear.In the study, published in the journal Science, they assessed nearly 300 recently identified human SARS-CoV-2 antibodies, and uncovered a gene frequently associated with those most effective against the virus.The researchers explained.