Somnipathic Brain Infection

The Somnipathic Brain Infection (abbreviated as SBI) is a parasitic infection that has seemingly devastated mankind in Sleepers. In humans infected with the SBI, they exhibit prolonged periods of severe insomnia before transitioning to a mindless, violent state referred to as "Sleepers", as the state only begins once the infected eventually falls asleep and is seemingly permanent.

Transmission
How the SBI was originally transmitted between people is unknown, but as the pandemic has progressed it has become clear that the infection spreads when Sleepers bite regular humans.

Symptoms
Once a human is infected with the SBI, they begin to experience an inability to sleep, even when taking medication or sedatives, and demonstrate a variety of symptoms that arise during normal sleep depravation. However, the infection appears to exacerbate all of these common symptoms, which include:


 * Headaches
 * Irritability
 * Concentration and memory difficulties
 * Reduced coordination
 * Impaired judgment and impulse control
 * Agitation
 * Hallucinations
 * Heightened aggression

When the infected eventually falls asleep from exhaustion, the infection completely takes over their brain and transforms them into mindless, violent, animal-like creatures referred to as "Sleepers". Sleepers demonstrate the following advanced symptoms.


 * Reduced heart rate
 * Extreme breathing difficulties
 * Reduced pain response
 * Blurred vision
 * Animal-like aggression
 * Intense muscle spasms