when an uninfected country closes borders etz, u've lost. the easy way to beat the game is to "new game" untill u start on madagascar. Choose parasite. Sell ur first symptom at once. buy lvl 4 drug res, and lvl 2 on the other resistances. then buy all the transmission stuff, one by one. Now all u do is wait. Untill all countries are infected, then buy the bad stuff ^^
if an uninfected country "closes down", start over
this is my best tactic ; )
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