Scientists at the University of Oxford have announced a human challenge trial that will investigate the response of the human immune system to a second SARS-CoV-2 infection.According to Shobana Balasingam, the vaccines senior research advisor at the Wellcome Trust — which is the organization funding the trial — “There are still many unknowns surrounding this virus, and human infections studies can enable us to learn a lot about COVID-19.”Stay informed with live updates on the current COVID-19 outbreak and visit our coronavirus hub for more advice on prevention and treatment.“This study has the potential to transform our understanding by providing high quality data on how our immune system responds to a second infection with this virus.”The.