Six and a half hours later.
Leon rubbed his temples as he returned to the lobby of the research facility's east wing.
Marvin and the others immediately gathered around him.
It was already seven in the morning on September 29.
"Leon, do you need to rest for a while?" Sherry asked, holding a box.
Inside were Annette Birkin's ashes, collected after everyone had helped cremate her a few hours earlier.
Mixed in with them were some of William Birkin's carbonized remains.
"No. I'm just a little irritated," Leon said, waving a hand.
Over the past five hours,
he had combined the Progenitor Virus data with the T-virus and G-virus to develop a new virus.
With the Super-Brain operating at full capacity,
although he had not spent long researching it, his results surpassed everything William and the others had achieved in decades combined.
Prototype S-virus.
That was the name he had given the new virus.
This virus possessed extremely broad transmissibility and lethality.
It could spread through the air and was incredibly resilient, remaining active for up to six hours after exposure.
Once infected, Leon initially estimated there was over a ninety percent chance that the patient would turn into a zombie.
And not just any zombie, but a Super Zombie with immense strength and incredible difficulty to kill.
But as long as they survived,
the infected could retain their sanity completely while gaining absolute physical enhancement and regenerative abilities.
However, its airborne transmission efficiency was still far inferior to ordinary respiratory infectious diseases such as pneumonia.
An infected person's breathing—or rather, their droplets—would not directly spread the virus.
Only when an infected person's bodily fluids or blood were exposed, allowing a large concentration of virus to gather, could it disperse through evaporation.
But even with those limitations,
as long as