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Pneumonia caused by the novel coronavirus has been classified as Class B infectious disease and managed as Class A infectious disease, Sun said, adding that measures including epidemic monitoring and quarantine should be carried out in accordance with the law.
"In order to detect the natural contents of various trace elements that represent the uniform mixing of the whole atmosphere, one must meet very high environmental requirements," said Sun Jinglan, deputy director of the comprehensive observation department of the China Meteorological Administration (CMA).
For his part, Maas said Wang's visit to Germany amid the fight against the novel coronavirus in China reflects the trust and support between the two countries.
"The decision about whether or not to declare a public health emergency of international concern is one I take extremely seriously, and one I am only prepared to make with appropriate consideration of all the evidence," the WHO chief noted.
During his stay in Davos, Han also attended a luncheon hosted by WEF Executive Chairman Klaus Schwab, and exchanged views with business leaders including Apple CEO Tim Cook and Siemens AG President Joe Kaeser.
来源：资阳报