See what Garland explained below:
It was this.
28 Days Later was a very uncynical film.
It had a punk sensibility.
And to get to make a follow-up to it, you couldnt be in a cynical mindset.
Theres various reasons why that wouldnt have worked.
And enough time had passed [with us].
There was a key idea that felt tonally correct to what we did 20-something years ago.
The zombie movies title explained.
28 Years Later follows a group of survivors living on an isolated island nearly three decades after the rage virus outbreak. Venturing into the quarantine zone of the mainland, they uncover dangerous secrets and transformations among both the infected and other surviving factions.