Italy was a good example today. I was asking how they went from no cases to the situation they had. They explained to me the spread of the virus, the ratio, the percentages, what they did and why they did so. A lot of that is lessons learned, so as we're looking at our own situation, we are learning how you can shove the peak, how you work with different authorities and what kinds of measures are effective.
Some countries have decided to close their borders. That doesn't seem to have been very effective in many regions.