"3.even with the exam I would institute a quarantine period of a few hours for new arrivals and any one who returns after encountering the undead. this will be necessary to ensure group safety. the quarantine area should obviously be separate from the main area AND quarantined individuals should be kept separate to ensure there is minimal risk of cross-contamination (don't lock the sick and healthy people in the same room)"

"That is true but im assuming any disease that could very quickly overpower modern defences would have an extremely short or extremely long incubation period (if extremely wrong it would simply be an asymptomatic phase in which the individual could still pass on the disease, resulting in the undetected spread of the disease to a large amount of people ). It is improbable that a disease with a relatively long incubation pable to spread quickly before authorities caught on and contained the outbreak, thus i assumed that symptoms would manifest quickly. I take your meaning though, and i like your formula better."