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US media said that novel coronavirus infection found in northern California was believed to be the first case of the United States from a source of unknown community. This finding is a disturbing turn, which means it may be a time for social isolation.
According to a February 27 article on the website of USA today, 60 patients have been confirmed in the United States, but this case is disturbing because no relevant contact history has been found. The center for Disease Control and Prevention (CDC) said there is still a possibility that the woman has been in contact with infected passengers in China. But investigators have not been able to find that connection. Another possibility is "community transmission", which means that the source of infection is unknown.
Obunaya omenca, an assistant professor and public health expert at the school of pharmacy and Health Sciences at Butler University, said there was a problem identifying only those who had contact with the patient. "If the source is not clear, tracking contacts may not be enough to stop the spread," omenka said
William hazeltin, a former professor at Harvard Medical School, said that the unknown source of infection shows that many people may not know that they carry the virus. "On the one hand, this is good news because it means that the virus causes very mild symptoms in many people. On the other hand, it means that people can infect others without knowing it. "

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