Here we go. Early narration tells us that the T-Virus has spread on a worldwide scale. Almost everyone's a zombie. We also learn that the bastards responsible for making the T-Virus are still experimenting with it underground. We're at the fourth installment, and I think it is time to revisit an observation made by Roger Ebert that questions the existence of the T-Virus, and this damn franchise. He ponders, â€œWe never understand how Umbrella hopes to make money with a virus that kills everyone."