With the newest patch all previously broken frozen virus achievements have been fixed. Here is how you unlock “Freeze things happen”.
How to Obtain Freeze Things Happen Achievement
Steps to Unlock
This is the easiest of the current frozen virus achievements.
Start in any other country than russia or other cold countries. Buy “Investigate outbreaks” and “Deploy Field Operatives”. When the you see banner news about the DrillZero site, buy “Vaccine Research” and…. do nothing.
After some time its reveal that DrillZero caused and super-spreader event and you’re one achievement richer.