Kai Kupferschmidt. (2021, December 1). If you’re curious how likely #omicron is to have spread from South Africa or Botswana to different places, @DirkBrockmann and colleagues have done some interesting calculations based on the world aviation network from 08/2021 You can see that US seems a very likely destination https://t.co/OSnZ6ZNble [Tweet]. @kakape. https://twitter.com/kakape/status/1466107074585239568