I started in middle east countries for this and all Frozen Virus achievements.
Step 1: Research "Investigate Outbreaks" and "Deploy Field Operatives"
Step 2: Sit around watching the news banners for one about PermaFrost mining in Country X
Step 3: Send Field Operatives to Country X
Step 4: When you see the next news banner about Country X beginning digging in the permafrost, research the following: "Vaccine Research", "Government Partnerships", and "Outbreak Intelligence Unit"
Step 5: Sit and wait. Achievement should eventually pop-up after some news banners.