This was a pretty good short story. Thought I'd share it with all of you.

I think it would make a pretty good book. Maybe it starts off with the girl and the doctor getting off the train because of that, and then they start walking down the street trying to get a cab and notice a few other people are the same way, leaning against a wall dead or something. Throughout the story they are both trying to figure out what is going on and they make it to an abandoned hospital where it all started. Maybe it's a virus or something like that, and it's killing people. Or it could be something that was recently put in a common type of medicine that people are taking and it slowly started to kill them. Idk.

Or maybe its cult worship

like they pressed themselves against her body to keep her from falling over

Oh.

Well he could probably see that she wasn't breathing or that she was unusually pale.

yeah they are called "signes of true death" and we learn them in med school : lividities, rigor mortis (stiffening of the body), algor mortis, cadaveric looking eyes. Besides that, if you saw a death body once it's imposible not recognize it again .. in less then 30minutes the whole body has a specific aspect. Nice story though...