A joint report by the World Health Organization and China this week concluded it is “extremely unlikely” that COVID-19 escaped from a Chinese laboratory, despite the theory receiving renewed attention following the comments of a former top U.S. health official.The long-awaited WHO report released Tuesday said the lab leak theory was the least likely of four scenarios considered by a team of international experts who traveled to Wuhan, China earlier this year to investigate the origin of the coronavirus. The researchers determined that the virus most likely jumped from bats to humans, probably via a third animal that remains unidentified.That conclusion stands in contrast to the comments of Robert Redfield, who headed the U.S. Centers for Disease Control and Prevention under President Donald Trump. Redfield told CNN last week he believes COVID-19 emerged from a Wuhan lab, though he stressed it was “only an opinion.”Critics — most prominently senior members …