Moderna's COVID-19 vaccine goes into final human trial stage

In a major development, the COVID-19 vaccine developed by biotech giant Moderna Therapeutics has gone into the third and final stage of clinical human trials. The late-stage study, first one to have started by the United States, is the last step before the vaccine candidate is lined up for regulatory review and emergency-use approvals. The trial is set across 89 US sites, including the Washington DC and some worst-hit regions.