2023年6月7日 · When health emergencies arise, scientists seek to discover the cause — such as how a pathogen emerged and spread — because this knowledge can enhance our understanding of risks and strategies for...

In February 2021, after conducting part of their study, the WHO stated that the likely origin of COVID-19 was a zoonotic event from a virus circulating in bats, likely through another animal carrier, and that the time of transmission to humans was likely towards the end of 2019.

2025年1月25日 · “CIA assesses with low confidence that a research-related origin of the COVID-19 pandemic is more likely than a natural origin based on the available body of reporting,” a CIA spokesperson ...

2025年1月25日 · The CIA now assesses the virus that causes Covid-19 more likely originated from an accidental lab leak in China, rather than occurring naturally, according to a statement from the agency Saturday ...

2023年11月21日 · There are two hypotheses as to COVID-19's origins: exposure to an infected animal or a laboratory leak. There is not enough evidence to support either argument. The latest...

Nevertheless, a large body of virologic, epidemiologic, veterinary, and ecologic data establishes that the new virus, SARS-CoV-2, evolved directly or indirectly from a β-coronavirus in the sarbecovirus (SARS-like virus) group that naturally infect bats and pangolins in Asia and Southeast Asia.

2023年4月25日 · The outbreak of the infectious respiratory disease known as COVID-19 triggered one of the deadliest pandemics in modern history. COVID-19 claimed nearly 7 million lives worldwide.

The most widespread coronavirus to date was discovered in Wuhan, China in November 2019, and the disease it causes is named coronavirus disease (COVID‐19).

2021年3月30日 · WHO calls for further studies, data on origin of SARS-CoV-2 virus, reiterates that all hypotheses remain open

2022年8月15日 · Until recently, there were multiple theories about the origins of SARS-CoV-2. Finger-pointing, politics, and mis- and disinformation soured the discussion, but researchers have continued to prod for answers.