my boyfriend and I saw I am legend on our anniversary. There were quite a few parts where I had to hold back the tears. I happened to love this movie, because as scary as it may be, something like that is possible. Not to the full extreme, but it is possible. I loved the fact that they didn't tell you what happened with his family. I liked the whole flashbacks. It sort of kept you in check and WHY dr. Neval stayed in NYC to find a cure. He was doing it for his family. That was a very touching movie if you really think about it. NYC that has about 9 million all of a sudden went down to one. His only companions was his dog samantha and the manikins he set up around the city.
The ending was the perfect ending to it. It didn't leave it open for a sequel, as the main character had died.
All because there was a single community, doesn't mean that they didn't know what to do to get a cure. Remember it didn't take place in 2007 or 2008, so everything had advanced by then.
Overall, I'd see that movie a thousand more times.