Wow, amazing, I tried as hard to find a cure until the last day, but then I quit, thought that John would want to pass his last moments with his daughter. The game really goes for the idea of only having one chance, you can't refresh the page to play again, the things you do are definite.
It's is an interesting idea, to say the least. In video games we are used to the idea that there's no consequence, that whatever happens we will just be able to go back and try again, but not here. Would be interesting to see that in other games. It has some problems tho, you can't really go back and try it differently to get all of the content, and you can't really relive the experience (which would be nice, the game is quite an amazing experience). But I guess it also relates to real life with that: you can't go back to see what would have happened if you had done things different and you can't really relive great experiences, they are just memories.
Nothing to complain here, everything the game delivers it does well.