The COVID-19 epidemic was first diagnosed in 20 19, and began to break out. Before the diagnosis in China, there were cases of COVID-19 epidemic abroad, and the specific start time needs further investigation and verification.

The outbreak in COVID-19 began on June 5th, 2020+10. Unknown pneumonia was found in Wuhan on 20 19- 12, and 10 showed an outbreak in 2020. However, there is evidence that Wuhan is not the first place where COVID-19 appeared on the earth.

According to the Italian newspaper La Repubblica website 20211.11,an international research team led by the University of Milan, Italy, exposed an important discovery. The earliest human cases of COVID-19 infection appeared, first in COVID-191/.

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