Following the revelations that U.S. government agencies like the FBI and the Energy Department are endorsing the COVID lab-leak theory and studies that show the effectiveness of natural immunity and the ineffectiveness of mask-wearing and lockdowns,
US government is divided about origin of pandemic. 5 government departments favor natural origin. 2 departments favor lab leak theory and 1 department remains uncertain. But virology and epidemiological community is much less divided because of strong evidences for natural origin and no evidence of lab leak.
Cochrane review of 51 studies conclude that lockdowns are important in reducing the number of covid deaths and people infected. Despite many studies showing that masks work, Cochrane review is doubtful about masks because of research limitations. For examples, inconsistent mask wearing by populations and only 6 of 78 studies conducted during the pandemic.
Doctors still recommend vaccination for people who recover from infection. Best protection combines both natural and vaccine immunity.