A crash course in changing the world.
In my opinion Ushahidi could be a really powerful weapon against many kinds of crisis. It could be used to identify the most impacted regions in case of an epidemic or the spread of a disease with the help of shared information. Another idea is the case of an earthquake or a flood. It could help to identify the information and publish it to alert the community around.
Concretely, in the former years the avian flu or bird flu which spread in Europe and Asia could have been regarded from a much more lucid level. The symptoms reported by the Ushahidi users could have been used to geographically identify the start of the flu and better comprehend the progression.