Anyone know this book? Girl returns from trip to discover that a plague has wipe

Question: Anyone know this book!? Girl returns from trip to discover that a plague has wiped out everyone!?

Okay, this one is really mixed up in my mind!. I'm trying to think of the details, and here is what I can come up with:

A teenage girl was on some kind of trip, and when she gets back she finds that a plague has swept through her city and wiped out pretty much everyone!. Her parents are dead in her house!. She finds one of her friends who has survived!. Then she has to survive and get out of the city!.Www@QuestionHome@Com

Best Answer - Chosen by Asker:

Plague by Jean Ure

There's a sequel too, but I haven't read it!.Www@QuestionHome@Com

"Plague" by Jean Ure
http://www!.amazon!.com/Plague-Jean-Ure/dp!.!.!.
"Fran, 16, returns from four weeks on a wilderness survival trip to a city eerily quiet and the residents gone--either hiding in fear, or dead from a mysterious illness!. Although the area has been sealed off to prevent the disease from spreading, Fran finds a way home, only to discover that the plague has arrived before her!. Her story alternates with that of classmate Shahid, an outsider by virtue of his race!. The third member of the triumvirate is Fran's best friend, Harry, whose natural impulsiveness has been exacerbated to near-insanity!. The three set out to find Shahid's brother on the north side of London!. As Harry becomes more unstable and Shahid becomes ill, it is left to Fran to save them!. Both the physical struggle to survive, and the character development that supports and results from it, are clearly and accurately depicted!."Www@QuestionHome@Com

i saw a movie like that its called 28 days later!Www@QuestionHome@Com