Business owner Chris Johnson uses a thermal fogger to disinfect trucks at a haulage firm in Barnsley,  south Yorkshire on April 22, 2020, during the nationwide lockdown due to the novel coronavirus COVID-19 pandemic. - Oxford University is launching a human trial of a potential coronavirus vaccine, with the daunting aim of making a succesful jab available to the public later this year. (Photo by Oli SCARFF / AFP) (Photo by OLI SCARFF/AFP via Getty Images)