The Echo virus
The "Echo" virus swallowed the world in less than three weeks. Unlike Hollywood clichés, the infected didn't have rotting skin, decayed brains, or milk-white eyes; they looked completely normal on the outside, except for one nightmarish trait: being locked into their last pleasant memory.
Before its total collapse, the World Health Organization announced that this pathogen hijacks the motor skills and control of the cerebral cortex, but leaves consciousness and perception completely intact.
This means:
Your body turns into a ruthless, toxic killing machine.
Your mind remains imprisoned in a corner of your skull, watching all your body's atrocities in absolute horror.
Your vocal cords involuntarily and continuously repeat a single cheerful, nostalgic sentence.
My little sister, Sara, got infected last night. She is now cowering in a dark corner of the room, staring at me with terrified eyes, whispering in a soft voice:
"Mom, look how high I'm going on the swing without anyone pushing me!"
But her hands... her hands reach for my throat with superhuman strength. Her nails tear through the skin of my neck. I press the barrel of the gun against her forehead. I see the begging in her tearful eyes; inside the fleshy prison of her body, she is screaming at me to pull the trigger. Yet her mouth still smiles, saying: "Look how high it goes..."
-Shot-
The room falls into silence.
I collapse to the floor. A sharp, stinging burn ripples through my body. It takes me a moment to notice my slight bleeding.
Suddenly, my jaw muscles contract. An involuntary smile spreads across my lips. My mouth opens, and in a voice I no longer control, I whisper:
"Happy birthday, Sara, come blow out the candles..."