Stephen King's the Stand

A deadly and highly communicable flu wipes out almost the entire human species. The military try to cover their negligence, but is it really an accident? Or, is some sinister force behind it all? Very few survive the ordeal, but is it really their immunity? Or, are they chosen for the greater good? The survivors are haunted by supernatural dreams of a mysterious old lady and an evil being, thus dividing them into two different groups.