Why the Pandemic Probably Started in a Lab, in 5 Key Points

By Alina Chan, molecular biologist at the Broad Institute of M.I.T. and Harvard.

On Monday, Dr. Anthony Fauci will return to the halls of Congress to testify before the House subcommittee investigating the Covid-19 pandemic. He will most likely be questioned about how the National Institute of Allergy and Infectious Diseases, which he directed until retiring in 2022, supported risky virus work at a Chinese institute whose research may have caused the pandemic.