China has vehemently denied the lab leak theory, suggesting that the origin of Covid-19 should be investigated by scientists, as concluded by a joint WHO team that deemed a lab leak "extremely unlikely." While the WHO investigation initially supported a natural origin for the virus, the ongoing debate has led to growing skepticism and doubts regarding the natural origin hypothesis. Scientific disagreements continue, as many researchers assert that no animal has been identified to closely match the genetic makeup of the coronavirus, leaving room for speculation about its origins.