Medicine Professor discusses the COVID-19 vaccine race

Scientists around the world are racing to develop a vaccine for the novel coronavirus. 

In the United States, the first human trial of a vaccine has already started. 

But we're a long way off yet from knowing if it will work. 

CGTN's Asieh Namdar discusses the race to find a vaccine with Dr Carlos Del Rio, Professor of Medicine, Global Health and Epidemiology at Emory University.