Covid-19 के vaccine का इंसानों पे trial शुरू I Human trial of new vaccine begins in UK Covid-19 के vaccine का इंसानों पे trial शुरू I Human trial of new vaccine begins in UK Chandan Kumar June 25, 2020 Coronavirus: Human trial of new vaccine begins in UK ब्रिटेन के नए कोरोनावायरस…