How does Elie leave the concentration camps?

It's
April 1945, and the end is almost nigh for Nazi Germany. The SS officers in charge of the
Buchenwald concentration camp have got wind that the American army is fast approaching. So they
decide to evacuate and kill their remaining prisoners. Although the Germans manage to kill most
of the prisoners, they're unable to finish the job due to the rapid advance of the American
army. Not only that, but the resistance movement drives the SS out of Buchenwald, ensuring that
the Germans are unable to complete their murderous plans.

Not long after, the
Americans arrive at Buchenwald, and the surviving prisonersElie among themare liberated. But
Elie is so hungry that all he can think about is getting something to eat. He quickly comes down
with food poisoning and ends up in the hospital. While there, he looks at himself in a mirror
for the first time since leaving Sighet and is shocked to see what looks like a corpse staring
back at him.