Maybe they are effective - it remains to be seen in an internationally vetted way. And they also had an opportunity to disseminate globally that they had doctors reporting issues, but instead they maintained until at least the middle of January (this started in November) that human-to-human transmission wasn't documented.

Nothing they say inspires confidence given their history and current actions, especially when it's ostensibly at odds with the experiences of almost the entire rest of the world with higher living standards and more uniformly modern systems.

Increasingly as time goes on, I have a harder time believing this is anything other than another shooting the messenger, Chernobyl-style event from an oppressive, information-deprived regime.