The article is very strong, and well paced. With a particularly creepy entity and its horrible infection method. The interviews feel a bit weak though, they stood out to me, but not in a positive manner. This line here just as an example.
Everyone of us on the ground floor tried to get out,
I think 'Everybody on the ground floor tried to get out' or 'We tried to get out, me and everyone else.' might sound more natural.
Overall though, still a Strong Article. I recommend maybe getting someone to go over the interviews with you, to make them stronger. +1 Still, for all the effort you've put into this RPC.