'China’s health minister Ma Xiaowei had some very bad news Sunday about the Wuhan coronavirus: He said people can spread it before they have symptoms.
A veteran adviser for a US health agency called the news a "game changer."
“When I heard this, I thought, ‘oh dear, this is worse than we anticipated.’ It means the infection is much more contagious than we originally thought,” said Dr. William Schaffner, a longtime adviser to the Centers for Disease Control and Prevention.
Schaffner added that this new piece of information called into question the current US practices for containing the virus so it doesn’t spread beyond the three cases that have already appeared in Washington state, California, and Illinois.'
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China says virus can spread before symptoms show -- calling into question US strategy to contain virus, January 26, 2020
Context(Ground all global flights, quarantine China) - '..this new coranavirus can easily spread..'(WHO failure) CNN - '..the World Health Organization's decision to hold off on declaring the outbreak "a public health emergency of international concern" is baffling..'