London

London: Johnson & Johnson said it would start human trials of its potential COVID-19 vaccine in the second half of July, two months earlier than planned, as drugmakers race to develop a shot for the deadly respiratory disease. There are currently no approved treatments or vaccines for COVID-19, the illness caused by the new coronavirus that has killed more than 400,000 people globally. J&J's study will test the vaccine against a placebo and assess the shot's safety and immune response in 1,045 healthy people aged 18 to 55 years, as well as those 65 years and older. The trial will…