U.S. Report Found It Plausible Covid-19 Leaked From Wuhan Lab

WASHINGTON—A report on the origins of Covid-19 by a U.S. government national laboratory concluded that the hypothesis claiming the virus leaked from a Chinese lab in Wuhan is plausible and deserves further investigation, according to people familiar with the classified document.

The study was prepared in May 2020 by the Lawrence Livermore National Laboratory in California and was drawn on by the State Department when it conducted an inquiry into the pandemic’s origins during the final months of the Trump administration.

It is attracting fresh interest in Congress now that President Biden has ordered that U.S. intelligence agencies report to him within weeks on how the virus emerged. Mr. Biden said that U.S. intelligence has focused on two scenarios—whether the coronavirus came from human contact with an infected animal or from a laboratory accident.

People familiar with the study said that it was prepared by Lawrence Livermore’s “Z Division,” which is its intelligence arm. Lawrence Livermore has considerable expertise on biological issues. Its assessment drew on genomic analysis of the SARS-COV-2 virus, which causes Covid-19, they said.

Scientists analyze the genetic makeup of viruses to try to determine how they evolved and spread in the population. Proponents on both sides of the debate over the origins of Covid-19 have cited such analysis to try to make their case.