If Taiwanese health authorities say something it's wise to listen - despite them being banned from WHO - especially because of that actually.

Health minister Chen Shih-chung stressed that "it was not clear to which extent and how long they would protect people".

That's a good point. I've read some reports saying protection may last as little as 3 months. I'm not sure what happens then - do we need to take another course of shots? Will the vaccines still be effective.

I hope it works and we can be done with it - otherwise the world is gonna be fresh out of party tricks.