The movie is about
It is set after the events of the first film, depicting the efforts of NATO military forces to salvage a safe zone in London, the consequence of two young siblings breaking protocol to find their infected mother, and the resulting reintroduction of the Rage Virus to the safe zone.
The deleted scenes weren't on the dvd extras or blu-ray
Look at this old trailer THE FIRST TRAILER OF THE MOVIE
2:21 in the trailer
https://www.dailymotion.com/video/x1n3bq
It shows the blue guy has been now infected shouting at the screen
1:49 in the trailer
https://www.dailymotion.com/video/x1k120
I don't know if this was deleted but I never since this scene
https://youtu.be/7ueS-kE3h3Q?t=8
The boy that got the whole group dead was infected
here is an image from the wiki
Boy from sandford
He was the one who attracted the infected to the group
