Subtweet to media, especially science writers. When WHO says "there is no evidence", they don't mean something is false. There is no evidence either way. It could just as well be true. Also, "correlation doesn't imply causation" is wrong and stupid, and doesn't debunk anything.
Once you get in the weeds, you can have causal dynamics suppressed through other vectors, and thus no correlation. That said, point is people are saying “correlation doesn’t imply causation” as if it were debunking something.