The Biggest Unanswered Questions In Evil Dead Rise

Deadite Ellie is the main antagonist of "Evil Dead Rise" but as she rampages through the apartment building, more and more people become possessed by the Deadites. Two of her children, Danny and Bridget, end up turning into monsters, and several of their neighbors also become members of the undead. At the film's climax, Ellie, Danny, and Bridget fuse into one awful creature that Beth manages to defeat with a chainsaw, a grinding truck, and a bit of luck.

After taking out the combo creature, Beth and Kassie sprint out of the building and leave their horrifying night behind them. No one can blame them for getting out of there as fast as possible, but their haste might make you wonder if Beth and Kassie leave a handful of Deadites still alive on the floors above the garage. This would be an astute thing to wonder about, because they definitely do that. 

At the end of the movie, Jessica gets attacked and possessed by one of the remaining Deadites. The movie doesn't make it clear if Jessica's attacker is one of Ellie's neighbors or some remnant of Ellie herself, but either way, that entire apartment building is still overrun with the undead.