In recent months, consideration of the so-called lab leak hypothesis has seemingly gained momentum
By Jessica McDonald •
NBC Universal, Inc.
A year and a half into the COVID-19 pandemic — and with a death toll approaching 4 million lives — how the coronavirus came to spark a global scourge remains unknown. Was it the result of a spillover from an animal to a human, as has happened repeatedly in the past? Or did the virus accidentally escape from a nearby lab in Wuhan?
The default answer for most scientists has been that the virus, SARS-CoV-2, probably made the jump to humans from bats, if it was a direct spillover — or, more likely, through one or more intermediate mammals. That’s what happened with the coronaviruses responsible for SARS and MERS, and such zoonotic events are standard fare for emerging pathogens.