No idea what this is supposed to be about or what it is supposed to be a commentary on. Its story ideas and characters are a loose, jumbled collection of elements that don't work either independently or in combination.
This poster <-- is the scariest thing about this movie. It is not uninteresting, with interesting characters such as the native American sheriff with familial ties to tribal elders, and David Warner as a scientist with a WHO grant and a jones for killing bats. It just never comes together in a compelling way or manage its nature-gone-wild and supernatural elements.