It means that there is a question mark that hangs over the progress of the virus in China. It's perhaps more significant to get animal viruses, because this virus is still something that is primarily in the animal sector.  -   Roy Wadia     Quotes
It means that there is a question mark that hangs over the progress of the virus in China. It's perhaps more significant to get animal viruses, because this virus is still something that is primarily in the animal sector. Roy Wadia
 Progress