coronavirus is spreading like wildfire. just four months after it was first detected, it has spread to over 180 countries, infecting more than 1 million people.
at this moment, at least 20 vaccines are in development around the globe. but there is still so much we don't know about the virus – how it spreads, how it affects its victims.
the following cases shed light on why we should remain cautious about this slowly unraveling mystery.
on-camera reporter: serena dong
scriptwriter: serena dong
video editor: zhang wanbo
filmed by fu gaoliang
chief editor: wang xin
producer: wen yaru
director: zhang shilei
supervisor: fan yun
