Zed was a good friend to Sam. They grew up together and remained friends even though they grew apart when Sam pursued science and Zed lived the simple life of a carefree ice deliveryman.
When the outbreak hit, society went into a frenzy of destruction. By year two, there was little need for deliverymen, and Zed wanted to help in any way he could. He offered to help Sam with his search for a cure. Although he successfully created a vaccination, Sam had other motives behind his research.
There are no returns. No do-overs, and no exceptions. If you buy this comic, you are certain to love and cherish it for all time.