Then He Remembered the Plague

I'm sharing another short piece of my son's writing (he's 12):

It was no normal tank, of course.  Its sheer bulk was so immense it ripped the cement from the curb. Hamel was surprised that no one else had noticed it.  Then he remembered the plague. Almost everyone in his district had been infected.  Hamel had only barely managed to scrape up enough money for one vial of the vaccine.  Everyone infected was shipped off to be cared for in state of the art hospitals.  That is, if the government's flashy billboards and radio announcements were to be believed.