I recomend doing something along the lines of your other game heroes empire: TCG and putting a pack or two in offers that are not as expensive as the other packs. (almost like special offers but you buy them with gold instead)
i made my parisite symptomless and madigaskar still survives...how to infect madegaskar is the question and when i grow up i am moving to madigascar so i will never be infected by a super disease
"Low wages, bitter cold, long hours of complete mind numbing grind." Working as described :D