1)Pick Virus. 2)Start in Canada, New Zealand, Greenland, or Madagascar. 3)Sell starting symptoms, if any, and buy sneezing (unless it is what you started with, just keep it). 4)Buy 1-1-1-1 resistances but no transmissions (they trigger infections). 5) Once nine countries are infected, sell sneezing to get rid of visibility. 6)Wait until all countries are infected. If Madagascar closes its shipyards and is not infected in 30 days, restart. 7)Buy all five drug resistances, sneezing, coughing, and fever. 8)After a few days, unlock tiers 2-3, keeping whatever symptoms it gives you. 9)Buy fever, fudge, diarrhea, pulmonary edema, and hypersensitivity. 10): Wait until everyone dies. keep this comment alive.