Not if they're gleefully watching "the West" crush themselves in mass panic...

That's not what they're doing. China is losing her biggest customer, possibly for an extended period of time. If America's economy collapses, China's likely will too.

They have shared a lot of data and I've heard scientists in the west to be very thankful over that.

Does the tests for antibodies even exists yet? I heard it was some weeks away?

Well sure, you don't just lay all your cards out on the table when you've got a good hand going.

There are already rapid antibody tests available. It's extremely curious to me why they haven't been used or we at least aren't seeing any data that they have.

This isn't about a rapid test, but is still interesting: https://globalbiodefense.com/headlines/singapore-first-to-te...