Fatima Hassan (Pegah Ghafoori) became one of FROM's most theorized characters in S4 when Tilly revealed she knew about Fatima's pregnancy before Fatima did. a moment of apparent precognition that the show has not fully explained. Fatima is pregnant in a town where nothing happens without meaning, and where pregnancy has never before been part of the town's story. S4E7 escalated this: her protective link seemingly activated to save Kenny, suggesting the pregnancy may function as a supernatural anchor or antivirus.
The dominant theory is that Fatima's pregnancy grants the child (and possibly Fatima) some form of protection from or immunity to the town's mechanisms. The 'antivirus' framing. that the child is a counter-agent to the town's curse. is gaining significant traction post-S4E7.