BAGHDAD — No, Miriam, Santa Claus did not forget you this year.

In these circumstances, though, and being far from home, it is a reasonable question for a 5-year-old to ask.

“Yes, he will come, he will never forget you,” Miriam’s mother, Hamama, told her.

For months now, since militants of the Islamic State stormed her hometown, Qaraqosh, in northern Iraq, near Mosul, and began killing and driving out Christians, home for Miriam and dozens of her old neighbors has been the run-down Al Makasid Primary School in Baghdad. To get by, they have relied on the kindnesses of the nearby church, and of local Muslims, too.

In the school’s dingy courtyard there is a tree, trimmed in balls and bells, and a Nativity scene. A few gifts have been donated — toys, clothes, dolls and candies. It is not much, and nothing like being at home, but Christmas has not been the same in Iraq for a long time now.

Two numbers tell that story. In 2003, when the Americans invaded, there were an estimated 1.5 million Christians living in Iraq. Today, experts say, there are fewer than 400,000, many of them on the run from the Islamic State.