Is 28 years later part of the same universe as 28 days later?

28 Years Later is described as a continuation of the 28 Days Later film series, thereby placing it in the same narrative universe established by the original film. The film introduces a new character, Samson, portrayed by Chi Lewis‑Parry, who is an unusually large and highly aggressive infected variant classified as an "Alpha". Samson’s appearance in 28 Years Later sets up a new storyline that is explored further in the 2026 sequel, 28 Years Later: The Bone Temple. In that sequel, Samson’s evolving condition becomes central to the plot’s exploration of the rage virus and the potential for treatment. The series overall was created by Alex Garland and Danny Boyle, who are credited with originating the original 28 Days Later franchise.

The fact that 28 Years Later and its sequel are explicitly referred to as part of the 28 Days Later film series confirms that they share the same fictional setting, characters, and thematic elements. Therefore, 28 Years Later is indeed part of the same universe as 28 Days Later.