Tried playing through all levels (upto Custom). It is interesting. Of course it is simplified- so I could stop an outbreak by ring immunization- protecting over 90% without immunizing more than 10%! Probably early detection and quick response is the best response to fast growing epidemics and one can overlook trying to persuade resistant non-vaccinators if they are randomly distributed as in these cases. However protecting a cluster of refusers will not be easy and possibly a scenario with that (cluster of refusers) highlighted could be added at "Level V". Will be using this as a teaching aide tomorrow- hope it passes on some insights to our staff