The game on Insane was overtly challenging . Big WIN when the badge was accomplished. (It was an internal, "it finally happened" type of internal win.) Seems like it was coded over night.
The tactics below work. Cheers to whomever posted it.
something like 75-80 days. started in Cuba.1) Pick Virus. 2) Start in Canada, Greenland, New Zealand, Cuba (if not, restart.) 3) Sell starting symptoms (if any), other than sneezing. If you don’t have sneezing, buy it. 4) Buy 1-1-1-0 resistances. 5) Once your disease spreads to a few countries, sell sneezing to get rid of visibility. 6) Wait until all countries are infected. If Madagascar closes or this is after day 30, restart. 7) Buy all 4 Drug Resistance and buy sneezing, coughing, vomiting. 8) After a few days, unlock tier 2-3 keeping whatever symptoms it gives you. 9) Buy fever, fatigue, diarrhea, pulmonary edema, hypersensitivity, and hemorrhaging. 10) Wait until everyone dies. copy and paste if it worked for you.
 "Take Something Literally"){kind=icon}
 "Run Elephant Run"){kind=icon}
 "Ghostscape"){kind=icon}
 "Pandemic 2"){kind=icon}
 "- Music in Motion -"){kind=icon}