The novel coronavirus Sars-CoV-2 was reported in China about a year ago, and the international scientific community first knew about the existence of the virus. Since then, there have been controversies over the source of the virus and the time line of the epidemic. According to a new study in the United States, the virus may exist in the United States several weeks earlier than the first confirmed case in the United States. Scientists from the Centers for Disease Control and Prevention (CDC) recently published the findings in the journal clinical infectious diseases.
Doesn't the virus come from China?