[However, during this one and a half years, due to the emergence of the J Virus, a large-scale evolution of zombies occurred. Tyrant-level zombies were everywhere, and super zombies became quite common. There were even higher-level zombies defined by humans as "Zombie Lords." Under the leadership of these Zombie Lords, who possessed intelligence on par with that of adult humans, the increasingly powerful zombie tide placed tremendous pressure on humanity.]
[Over the course of the year and a half of defense, humanity's population had decreased by nearly fifty percent. Meanwhile, the zombies, led by the Zombie Lords and super zombies, continued to receive reinforcements from zombies across other continents under their control. The human defense was becoming increasingly strained. Even with everyone in the army, the defense lines were on the verge of collapse.]
The system's explanation paused here.
Lu Jie stood high in the sky, overlooking the land below.
The war between zombies and humans had never ceased.
Ordinary zombies were fearless of pain and death, with only a hunger for human flesh. Under the control of higher-level zombies, they could launch an unrelenting assault.
Humans, however, could experience fatigue, hunger, and mental strain. There was a limit to their endurance, and thus they could only defend in shifts.
If a super zombie managed to bite a human, the enhanced human would either die instantly or be decapitated by their comrades to prevent becoming a new super zombie.
In this bloody conflict, humans either became numb or developed an iron-willed, unyielding spirit.
Lu Jie raised an eyebrow as he observed the long-lasting war.
"Humanity hasn't developed Gene Serum 3.0 yet? At this rate, humanity will fall apart."
This was still under the assumption that nuclear weapons served as a deterrent, and Zombie Lords were too afraid to appear in human sight. Without nuclear weapons, the Zombie Lords would have already rushed to the city walls to slaughter everyone.
Against the Zombie Lords, the current new humans were merely food for them.
New humans who had only injected Gene Serum 2.0 didn't possess superpowers. Only those who injected Gene Serum 3.0 and were fortunate enough to gain superpowers had a chance to contend with the Zombie Lords.
Of course, even with this capital, it would take multiple super-powered new humans to besiege and defeat a Zombie Lord.
"During the 'Post-Apocalyptic Evolution' storyline, Elder Zhao spent five years developing Gene Serum 3.0 based on Gene Serum 2.0," Lu Jie murmured, stroking his chin. "Under the current situation and with humanity's talent pool, if resources were sufficiently supplied, they should have developed it by now."
[Host, you've forgotten something. The variant MR Virus you provided to Elder Zhao was a concentrated version of the mutated MR virus.]
The system chimed in.
"That's a good point," Lu Jie raised an eyebrow.
He'd seen how terrifying the concentrated version of the MR Virus could be. The Tyrant-level super zombie, although considered a super zombie, was actually far stronger than the Zombie Lords.
The concentrated MR Virus was even more potent than the current J Virus.
Naturally, the J Virus was stronger when compared in the same volume and concentration.
[As the host pondered, three months passed. Humanity finally developed Gene Serum 3.0. The high command was overjoyed and began manufacturing the serum at any cost to inject it into their military forces.]
[After five years of effort, humanity successfully injected Gene Serum 3.0 into five million soldiers, rescuing them from the brink of collapse. The zombie tide could no longer pose a major threat to the three major human bases. Humanity sighed in relief.]
[However, humanity remained vigilant, aware that the virus could mutate again. Using the J Virus as a model, they continued to study new virus serums day and night, while also exploring the development of Gene Serum 4.0.]
[But humanity's five-million-strong new human army, along with around five hundred thousand super-powered soldiers, had to face the fact that zombies, too, were evolving. Super zombies were everywhere, and Zombie Lords were scattered all around. Even more terrifying, the appearance of Zombie Kings added to their woes.]
[The Zombie King led countless Zombie Lords and super zombies to attack the three human bases. A bloody battle ensued, and in the end, humanity had to sacrifice over ten thousand super-powered soldiers to severely injure the Zombie King, who fled in terror. The zombie tide gradually dispersed, and humanity finally gained a moment to rest and recuperate.]
[However, with the Zombie King still alive and Zombie Lords and super zombies lurking everywhere, humanity dared not leave their bases. They could only continue to survive within, hoping to develop Gene Serum 4.0 and eradicate all the zombies in the future.]
"Finally, a new balance has been struck," Lu Jie said casually as he finished watching the earth-shattering battle unfold. He smiled faintly. "If nothing goes wrong, there should be a long period of peace between the two sides."
As long as the Zombie King stayed far away from human sight, there would be no risk of nuclear strikes.
Humanity, likewise, wouldn't dare to leave their bases and would focus on bolstering their defenses.
This situation, he thought, was exactly what he had hoped for.
Looking at the time, the giant meteorite was still less than 40 years away from crashing into Blue Star.
"I hope humanity can figure out a way to destroy that giant meteorite," Lu Jie shook his head. "Otherwise, it'll be troublesome. If they can't stop it, there's no chance they'll develop Gene Serum 5.0."
Right now, humanity's technology had strayed from its normal course.
Lu Jie sighed. They had completely veered toward biotechnological research. There hadn't been much progress in weapons development. Instead, they had become more proficient in crafting cold weapons, much like the ancient days.
They had forged cold weapons usable by new humans and alloy armor to resist super zombie claws.
Well, this development was normal. After all, the world's background demanded it.
There was no time to think about anything else when battling viruses—survival came first.
[While the host was thinking, another thirty years passed. During these thirty years, humanity only managed to develop a serum for the J Virus, one that could prevent direct infection by Zombie Lords. Progress on Gene Serum 4.0 remained stagnant, and humanity's impatience grew. The population became increasingly divided, and internal conflicts arose.]
[Meanwhile, the number of Zombie Kings continued to rise. Even more terrifying zombies, known as Zombie Emperors, emerged. These Zombie Emperors possessed the ability to easily destroy entire cities, causing immense trouble for humanity.]
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