infection part2?

How this all happened: everyone thought that this disease was over until they forgot one person one person was half infected, and they knew that they were gonna get infected. Then they finally got infected and spread it to other people and then more and the more almost 5 different military groups came there and got wiped out by a month a quarter of the world  was wiped out and by a year half of the world was wiped out a very talented group came. They got wiped out another group came. They got wiped out until this one group has been training for almost 10 years. Only two of them died at first and got infected until big rainbow guy came, which is their leader  strong, big has claws, sharp teeth, rainbow color could even deflect bullets and then eat a special bullets, but they didn’t have that so they all died. Another group came. They saw the rainbow guy only 10 of them survive survived so they tried to start off with the plan….