There's No More Room in Hell - David Wilson - Bog

Twenty years ago the next global pandemic struck and the world wasn't at all prepared to deal with it. The virus overtook mankind, leaving in its wake a higher population of the infected rather than the healthy.
Governments and economies collapsed and borders were closed. Every country around the world decided independently on just how they were going to attempt to deal with the virus, and the infected. Some smaller countries fell victim entirely while others experimented in their labs to try and find a cure. All the while creating laws surrounding the infected ones that were far too ridiculous to follow, or to work.
And then, the bombs fell.
Seventeen years later and the only humans left roaming the lands were the infected, along with small groups of survivors. Primarily gangs, they sought only to rob and kill the few innocent people that were left trying to survive on their own. Kirk, a nomad, had decided three years ago that remaining on dry land was no longer an option for him, as it had become simply too dangerous. He made the decision to set sail and seek refuge, living what life he had left on the open ocean.
However, he was soon to discover even that wasn't safe.