from RT:

An executive with the drug firm previously said that the company was creating more potent strains of the virus in a laboratory

US drugmaker Pfizer admitted on Friday that it “engineered” treatment-resistant variants of Covid-19 in order to test its antiviral medicine. The admission partially backs up earlier claims by an executive with the company who told an undercover reporter that Pfizer was deliberately “mutating” the virus to “preemptively develop new vaccines.”