assistant: One unemployed man was fortunate to get a job as a janitor in an underground warehouse.But one day, while cleaning the warehouse, he found a secret door that led down to a deeper mysterious research facility.While investigating a mysterious research facility He was knocked out by a researcher who injected an experimental drug into his neck from behind. After that he lost consciousness. He regained consciousness and found himself trapped in an underground research facility. He tried to find a way out, but all the doors were locked. There is only a small air vent that can be an exit to the outside. but he was too big

When he thinks he's too big to enter the vent His body was getting smaller and smaller. Until enough to pass through the vent. Causing him to discover that at that time he had a special power that could change the size of his body as he wished.

After coming out to the outside world, he found that the entire city was infested with zombies. Almost all the people fled the city. He then sought a way out and discovered that The starting point for the zombies came from the research facility he found underground. It was one of the bodies the researchers left behind that they thought were dead. But turned into a powerful prototype zombie. spreading the virus to the whole city

and he also discovered that Medicine injected into his body It will gradually turn him into a zombie. The only way to survive was to take the original zombie blood and inject him into his body as an antidote. The blood that is left in the heart of the original zombie. He had to find a way to kill the prototype zombies.

assistant: Adam was absolutely aghast at his luck. At first he thought being able to grow and shrink was a gift from the heavens. He could grow to the size of a Goliath and easily prune the trees in his back yard when no one was looking or shrink to the size of an ant to sneak a peak at things he might not otherwise socially be permitted to view.

Probably shouldn’t of done what he did because karma seems to have caught up to him. Yesterday he was working on his super secret zombie serum for the US government. The idea was to collect blood from the umbilical cord of all US births a small amount of DNA from both the mom and the child would be present. That DNA would become familiar to the zombie virus and be ignored while ravaging all unfamiliar DNA.

It was a great plan and his superiors were all onboard. But then Adam made the mistake of growing to change a broken lightbulb bot realizing he was holding the sample vial. As his hands grew they were instantly cut by the glass causing his blood to mix with the virus. 

The unexpected pin prick from the glass caused Adam to briefly grow over 40 feet in 20 foot building. The liquid virus which was pressurized to stay a liquid turned into a gas when released and suddenly released through the hole Adam had made to the containment unit.

He quickly caught himself and shrunk back to size but the damage was done. The military assumed a spy informed precision attack from China and responded with a ballistic middle attack.

If only the nuclear response had destroyed Adam and the American population it would have been a blessing. Instead that nuclear material mixed with the virus gas causing it to spread across the planet in ways that defied the populations understanding of what was physically possible. The worlds human population was all zombies that is except for Adam.

He had survived having been cut and having his blood DNA mix with the virus right before it escaped.

Adam shook his head as he finished replaying the events in his head yet again. No he concluded, he had no luck at all and worst of all, he was starting to get hungry. Second worst of all, a world full of radioactive zombies out to destroy him.

prompter: I don't think Adam should be the direct reason that the zombie apocalypse starts. Please rewrite it so no way where Adam is completely oblivious to the start of the zombie apocalypse