Donning Diors and Daggers

"In 1953 a laboratory on an undisclosed location develops a serum that could genetically modify humans, giving them enhanced speed, agility, strength, and brainpower.
Scientists found a way to modify the serum, only activating itself in the presence of a Y chromosome, thus isolating the effects to men, mostly due to female discrimination.
The serum was a success, and sales exploded just a few weeks after its release.
What the developers did not anticipate, though, was the human body's incapacity to handle the serum. The mental and physical over-exhaustion triggered a mental decay which starts out slow, but speeds up exponentially within a few months after usage of the serum. The brains of the users are left with only the most basic survival reflexes, transforming the users into strong, fast, agile, emotionless human shells, devouring any mobile life forms in their way.
Bites from the affected could place copies of the serum into the bodies of the bitten, giving them the symptoms. No one was safe...
No one...
Except the women."