The After Dark series of fimls are usually pretty bad, so my expectations for this were quite low. Mulberry St. (2006) is a zombie film set in post 9-11 New York. The zombie virus is spread by rats that have begun biting people with more frequency. Victims turn into zombies and slowly mutate into a rat/human hybrid. It is a good low budget film. It could be even better if they got rid of the few cheesy fight scenes and the overacted macho posturing therein.
I see parallels to 28 Days Later, but I think the goal here was to have the city turn against its people and to have you root for the people to take back their homes. It has a blatant message about post 9/11 New York to convey.