Adjusted

Humanity is dying, sickness and pollution taking over, everything is failing but science. Scientists have come up with a way to alter human genetics to make us stronger, able to breath polluted air and fight off any sickness. But 594 people died to get the results that they wanted, now (20 years later) there are 500 Changes. They're not stable yet, so they're kept in labs, tested on and advanced until science confirms the success of Changes.
But there are flaws in the system. For a human to become a Change, they have to be taken directly after birth to a lab and altered. Their genes no longer the genes of humans, but the genes of a superior breed of humanity, they are dangerous to their enemy, but their only enemies are the people who made them this way.