I don't think it's worth looking at individual stocks in this instance, and I think you're not understanding why Zoom would drop on good vaccine news.
My point is that the market overreacts to every piece of good or bad news, then settles down as the full implications become clear. There are still a lot of unanswered questions about the vaccine, how we handle rollout, etc etc etc. That’s not really considered in immediate reactions like this, it’s all gut feeling.