28 Weeks Later (2010) Blu-Ray Zombie Movie

28 Weeks Later takes place 28 weeks after London was destroyed by zombies in the first movie and the US Army attempts to help resettle people who escaped from the first outbreak of the Rage Virus. Don(Robert Carlyle) returns with his kids thinking that his wife (Catherine McCormack) died in the original outbreak, but is shocked when she is found alive. While in quarantine it is discovered that she is carrier of the virus who survived due to a rare genetic immunity.

Eventually she infects others and the city becomes overrun by zombies again. The embedded scene below is the fire bombing of London in a desperate attempt to stop the plague.