This article investigates the evolutionary history of zoonotic viruses to determine if they must adapt within animal hosts before infecting humans. By analyzing the natural selection patterns of major pathogens like SARS-CoV-2, Ebola, and influenza, researchers found that most viruses do not require significant genetic changes to become capable of human-to-human transmission. Instead, many viruses...去小宇宙查看完整单集简介
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