The Boomer popup.


Autothysis and Liquefactive Necrosis cause some zombies to explode when excited and cover their surroundings with infectious slime - increasing their severity

Symptoms Needed

Liquefactive Necrosis

Achievement Earned


Boomer is a symptom combo exclusive to the Necroa Virus DLC which allows zombies to explode when excited. Severity increases when this combo is in play. The symptom Autothysis and the ability Liquefactive Necrosis are required. The achievement Boomer is earned for forming the combo.

It may based off of a type of zombie from Valve's Left 4 Dead franchise.

Symptom Combos in Plague Inc. and Plague Inc: Evolved.
AssassinBath TimeBlind GeniusBlood in the AirBoomerCarpe JugulumCranial DispersionDiscovery ChannelFly MagnetOn The Naughty ListOopsProfuse BleedingProjectile VomitingPublic DefecationRed Ape RedemptionRed RainRude AwakeningRunnerSpitterSwinefluSymptom CombosTankUltimate ChristmasVampire BatWalking ContradictionWalking DeadZombie Panic

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