3 Missiles in a Single Combat packet - how should this sticker be treated?
Yes.

3 Missiles in a Single Combat packet spoilers:


   Mutants ignore the troop-loss effects of the Fallout Zone and treat it like a biohazard. Mutants gain a troop at the end of the turn in a biohazard, so they gain a troop at the end of the turn in the Fallout Zone.