Predatory zombie hordes will reduce the world's population to 200 survivors within 100 days, according to a study published in a special topic in the peer-reviewed journal of physics at the University of Leicester.
Scientists finally got tired of working, they decided to get down to real business and finally created a physical and mathematical model that predicts the spread of the disease among mankind. In the new model, zombies perform the most difficult role as carriers of the virus on planet Earth.
The model divides the population into three categories: susceptible to infection, infected, and those who have died or recovered. The spread of infection occurs, according to the model, with the help of individuals in the population in contact with each other.
Initially, each zombie is expected to have a lifespan of 20 days and 90 percent success at finding and infecting one person per day – a factor that makes the zombie virus twice as contagious as the bubonic plague epidemic. It turned out that within 20 days one zombie can cause a pandemic, and the population within 100 days will decrease from 7.5 billion people to 100 – 200 survivors and somewhere around 190 million zombies.
However, this is the worst case scenario. He suggests that it will be easy for zombies to find people. In fact, scientists are confident that people would become more difficult to find, because the number will decrease, and they themselves will learn to avoid zombies and for some unknown reason to resist zombies.
A more optimistic scenario shows brighter prospects for humanity, even if the zombie's lifespan increases by a year. In a more positive mathematical model analyzed by physicists in another article, given human reproduction and a 10 percent chance that each person can kill one zombie a day, the human population can survive, albeit it will be greatly reduced. If all zombies die 1000 days after the apogee of their activity, people will need only some 27 years in order to begin to restore their population.
