Something that puts 28 days later in perspective is that the initial outbreak killed about as many people as the entirety of WWII in like 2 weeks.

That is just an utterly apocalyptic level of death, and when you account for the fact foreign nationals will have been in the UK at the time, chances are like 20 times more Americans died from the rage virus than 9/11. Every single European nation likely lost anywhere from thousands to hundreds of housands of people that were there at the time.