“ Then somebody else equally knowledgeable say , Oh , nonsense , see situations. ” Some comments meeting , e-mailed among group call , redacted.But three days later , February 4th , Andersen ’ perspective shifted.In e-mail different group scientists , recovered U.S.Right Know , investigative group , Andersen wrote , “ The main crackpot theories going around moment relate virus somehow engineered intent demonstrably case. ” By March , Andersen colleagues finalized letter , published Nature Medicine , arguing SARS-CoV-2 naturally spilled bat , evolving pandemic virus either animal host , unnoticed , humans. “ Our analyses clearly show SARS-CoV-2 laboratory construct purposefully manipulated virus , ” wrote.The paper extremely influential.In ensuing months , scientific consensus , echoed number mainstream media outlets , took view , virus likely resulted natural zoonotic spillover .