[s8e4] Infection, Part I -

The story begins with a rare and terrifying (necrotizing fasciitis) that begins spreading rapidly across the city. The Outbreak Begins

: Shortly after, Ambulance 61 discovers two more victims dead from the same infection in a private residence.

The horror starts at a where several first responders are relaxing. [S8E4] Infection, Part I

As the medical crisis unfolds, the teams begin to suspect this isn't a natural occurrence.

: The original victim, Stuart Anderson, is identified as a lab assistant who had previously made threats via email, suggesting a bioterrorist plot. Personal Stakes and Danger The story begins with a rare and terrifying

The episode ends on a high-tension cliffhanger as the team realizes the perpetrator is still at large and has a broader, more deadly plan for the city.

( S8E4 ) serves as the explosive opening to a massive three-part One Chicago crossover event, weaving together the worlds of Chicago Fire , Chicago Med , and Chicago P.D. . As the medical crisis unfolds, the teams begin

: Additional cases surface, including a woman and her child at a gas station, leading the CDC to step in as the situation escalates into a full-scale city epidemic. Investigation and Suspicion