> Why not? Something can feel instinctively correct and not be correct. For example, the sun going around the earth, or the earth being flat, for that matter.

> Why not? Something can feel instinctively correct and not be correct. For example, the sun going around the earth, or the earth being flat, for that matter. I'm not saying it should be 0, 1, 2 or 10 shots; I'm saying the answer is absolutely not obvious, even if you instinctively want to say zero. In a world where we're lacking information, the default should probably be zero. But given that this is a worldwide pandemic, we're not going to be running out of information any time soon, so it's good it's being studied.