The infected have evolved in '28 Years Later' — and they're scarier than ever

Aaron Taylor Johnson and Alfie Williams in "28 Years Later."

Sony Pictures Releasing

• The "28 Days Later" franchise sees society collapsing after a virus escapes a lab and turns people into zombie-like killers.
• In "28 Years Later," while people have adapted to survive, the Rage Virus has evolved.
• Here's how the infected are different in the sequel.

Warning: spoilers ahead for "28 Years Later."

In "28 Years Later," the Rage Virus that turned Britain post-apocalyptic in the original movie has evolved...