The world has collapsed under the weight of a deadly virus. The last fortresses of safety and civilisation are militarised quarantine zones. Checkpoints where every decision can mean life or death.
Your duty is to man that checkpoint. Your job: interview anyone showing signs of illness and decide who may enter. Turn away the infected to protect the zone. But reject too many healthy civilians and morale will crumble.
Interview each person using either preprepared questions or your own free text. Ask them anything and try and work out if they are infected. Once you are sure either approve or deny their entry.