not always getting experience points for damage or killing, had an instance where the unit was killing 10's of attackers, but no experience or kills showing in stats, makes it hard to level up units...
build resistances, ignore transmissions, sell symptoms. Wait till all areas infected, then add resistances and symptoms to get governments to react, shut down hospitals, then just add lethal symptoms.
 "Protector: Reclaiming the Throne"){kind=icon}
 "Pandemic 2"){kind=icon}