There was more than one source, but in SA Panda led the way with data to convincingly show that lockdowns were not justified.
p.s. They were also advised the PCR test is not a diagnostic tool. They ignored that, too.... choosing instead to use the test to conflate a +PCR result with a case. Which massively elevated the perceived risk.
This has been used to drive the panic which can then be used to do the kinds of things that would never otherwise be tolerated but has a net positive effect for their profit margin - to the tune of billions in a very short space of time, and to set aside constitutional laws, permitting crime to be committed on a scale that we will never recover from.
To anyone who thinks they are smarter than 'their' government, they are not as stupid as you think they are. They know far better than you that their asses are on the line for what they have been papering over, whilst you were drinking the Koolaid courtesy of their media mouth-pieces.