If you can't get funding for your research, or publish under your real name if you do, it's certainly going curtail research at least. It could still happen if some nations refuse to endorse the ban, but there will at least be less of it, which means less risk.
We're not talking about a targeted weapon, we're talking about accidentally unleashing an unstoppable global pandemic. If only China is risking that, the odds are better for everyone.
This sort of rhetoric is disgusting, and likely the exact sort that will lead to mass death incidents in our lifetime. I hope you think about that when such comes to pass.