There is also a study that shows many studies findings cannot be reproduced: https://en.wikipedia.org/wiki/Replication_crisis https://en.wikipedia.org/wiki/Repl

There is also a study that shows many studies findings cannot be reproduced: https://en.wikipedia.org/wiki/Replication_crisis https://en.wikipedia.org/wiki/Replication_crisis From where I stand, the countries that have a culture of wearing masks are doing better with regards to coronavirus. At the very least, it seems like a good hypothesis.