The F.B.I. and the Department of Energy concluded a lab leak as the more likely cause, while the National Intelligence Council and others believe in animal-to-human transmission. C.I.A. has remained neutral.
The coronavirus family historically transmits through animal-to-human interactions, such as the SARS virus from civet cats and MERS from camels. No major coronavirus escaped a lab before.
Scientists have identified five key pieces of evidence demonstrating the natural origin of previous coronavirus outbreaks, like SARS and MERS, which are lacking for Covid-19.
Alina Chan's essay brought renewed focus to the lab-leak theory, emphasizing the debate's significance in informing strategies against future pandemics.
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