Contagion: Andromeda Strain 2011?

It will be interesting to read how the new movie coming out soon, "Contagion" will be anything different from what "Andromeda Strain" proposed so long ago, in 1971. (I say read because, though it has the likes of Helen Mirren and Matt Damon in it, whose work I usually always enjoy, I will likely not see it unless I read or hear great things of it and from people or sources I trust). We'll see. Apparently the new one is based on disease spread by birds, if we are to trust the trailer, while "Andromeda" is more based on what the famous astronomer Carl Sagan suggested might happen when/if we were contaminated from space. Link: http://en.wikipedia.org/wiki/The_Andromeda_Strain