After reading some negative comments, I thought to give my own view to explain the inner works of the movie (which may have been deliberately left unexplained by the director). So, warning, major spoilers ahead if you have not seen the movie.
The thing that threw me off the most was the fact that the movie did not mention in the beginning that the 'samples' the NASA took were from the _sea_ of the Europa moon. This would have explained why the creatures were octopus-like. The beginning also gave the impression that the alien life was rich, from bacteria type (hence the term 'infection') to various sized creatures, but in fact the outbreak was only about one kind of creature.
The creatures lived most of their time in the ocean (not disturbing anyone) and came to surface only to lay their 'eggs'. It was also mentioned that the creatures were mostly peaceful and didn't pay attention to humans, unless provoked.
People had to use the gas masks, because the US sprayed chemicals to the jungle, trying to kill the 'eggs', not because of any air spreading infection.
This all leads to the movie title, which in my opinion meant us, the humans.
(And all above was only a backdrop to a love story :)
The thing that threw me off the most was the fact that the movie did not mention in the beginning that the 'samples' the NASA took were from the _sea_ of the Europa moon. This would have explained why the creatures were octopus-like. The beginning also gave the impression that the alien life was rich, from bacteria type (hence the term 'infection') to various sized creatures, but in fact the outbreak was only about one kind of creature.
The creatures lived most of their time in the ocean (not disturbing anyone) and came to surface only to lay their 'eggs'. It was also mentioned that the creatures were mostly peaceful and didn't pay attention to humans, unless provoked.
People had to use the gas masks, because the US sprayed chemicals to the jungle, trying to kill the 'eggs', not because of any air spreading infection.
This all leads to the movie title, which in my opinion meant us, the humans.
(And all above was only a backdrop to a love story :)