After the werewolf kills Erika, she is visibly breathing, still covered in blood; it is possible that she is dying and has not yet expired. However, when Waldemar and Karin open a wall and find two walled-up dead people in an advanced process of decomposition, they are also seen breathing, especially the bearded man on the left of the image.
When the university rector (Alfredo Santacruz) speaks, his lips are not synchronized with his words in Spanish.