Yeah, I've seen several people confidently stating "Humans have never successfully made a coronavirus vaccine", which just isn't true; we have them for animal diseases. And we've never had such good reason to make a coronavirus vaccine for human disease. https://twitter.com/AndyBiotech/status/1254572267427835906

That's not to say we'll succeed with covid, but if we fail, it won't be because you just can't make vaccines against coronaviruses.