-Source-Metro- A chilling simulation has revealed just how easily a new pathogen could wipe out a huge slice of the worlds population up to 900 million people. Researchers at John Hopkins University simulated the spread of a new illness a new type of parainfluenza known as Clade X. The simulation was designed so the pathogen wasnt markedly more dangerous than real illnesses such as SARS and illustrates the tightrope governments tread in responding to such illnesses. It could really happen (Getty) American politicians played out the scenario which was built to be extremely realistic where a doomsday cult released a genetically engineered virus. By the end of the simulation in May representing 20 months after the start of the outbreak there were 150 million dead around the world and no vaccine The researchers say that the simulation would have ended with up to 900 million dead nearly 10 of the worlds population. WhatsApp has finally introduced a group video chat feature Eric Toner of the Johns Hopkins Center for Global Health Security says the world was lucky the SARS outbreak wasnt worse. Clade X was designed to spread about as easily and kill a similar percentage to SARS Toner says. Toner told Business Insider I think we learned that even very knowledgeable experienced devoted senior public officials who have lived through many crises still have trouble dealing with something like this. And its not because they are not good or smart or dedicated its because we dont have the systems we need to enable the kind of response wed want to see.