What sorts of preparations would you consider adequate--other than not holding the event? While some things are being cancelled or postponed, the fact is that there are events and travel still happening more or less as usual around most of the world. People are still taking public transit. People are still going into offices. Sporting events are going on. I honestly have trouble distinguishing most of the events that have been cancelled (outside of Asia) from those that are going on.

For example, there was just a ~45,000 person security conference held in SF last week.