What's known about the outbreak here: Two persons had recently been to South Africa attended the event of 120 people. The company had requested that people should be fully vaccinated AND get a test before attending, but that's something they couldn't enforce. It's likely that everybody was vaccinated though, and quite certain that those who came from South Africa were (or travel would be difficult). Whether everybody actually tested themselves, hard to say. Only one of the 50-60 positive cases has been confirmed as omicron, but the rest are assumed to be the same. The story broke a few days ago and omicron was assumed, but that was confirmed yesterday. The participants are described as "young adults" (around 30 years old?) which means that they probably got their second dose a couple of months ago and should have maximum protection. It's reported today that all have mild symptoms described as headache, sore throat and some cough, like a cold.
I think it's safe to assume that the vaccines do not protect against omicron in any significant way, and neither will boosters. The problem is that politicians are stuck with their vaccination track and will refuse to realise that boosters and covid passes wont magically make this go away. This should have been realised months ago after the new wave in Israel, as I've pointed out before. The vaccine now appears mainly to offer the middle aged protection against critical disease for the old variants. If omicron takes over and can give symptoms worse than the flu, we're basically back to start, perhaps only better prepared to make improved vaccines, drugs and policies.