Your behavior today has serious and direct impact on not only your chances in three weeks but on the lives of other people around you. A cluster of sick people

Your behavior today has serious and direct impact on not only your chances in three weeks but on the lives of other people around you. A cluster of sick people in South Korea is traced to one person who attended church two weeks ago. So, no, this isn't about collective probabilities - this is about what you personally do. In any case, Elon Musk doesn't speak for individual behavior, he controls a company of thousands of employees. That's already collective behavior.