Zombies
Interior of an abandoned, boarded-up convenience store. Specks of dust are dancing in the flickering light of a single, overhead fluorescent lamp.
Two weary figures, MICK and JAKE, crouch low against an interior wall. They are lying in wait.
JAKE: How long does it take?
MICK: Huh?
JAKE: Before a person turns. How long, Mick?
MICK: One hour. Maybe less. Why?
JAKE: And it’s one bite? That’s all?
MICK: Yep. Bite, scratch, bodily fluids. Saliva, that kind of thing.
JAKE: How did it all —
MICK: (hushed whisper) Ssssh! Hold still. There’s one right across the street.
JAKE: (peeks through a gap) He’s… he’s one of them?
MICK: Yep.
JAKE: How can you tell?
MICK: He lacks qualia.
JAKE: He lacks what?
MICK: Qualia. A subjective conscious experience. There’s nobody home, Jake.
JAKE: He’s… waiting for a bus? He looks so normal.
MICK: They all do. That’s the damn thing.
JAKE: What… what do they want?
MICK: They don’t want anything. Not anymore. They’re p-zombies, perfect facsimiles. Action, reaction — but only an imitated self.
JAKE: Incredible. He’s talking on the phone.
MICK: Yeah. Full range of behaviors. They shop, they talk, they laugh, they sleep. Poke one with a stick and it lets out a simulated cry.
JAKE: But no qualia?
MICK: Nope. All gone. One bite, an hour tops.

I don't know if this is a long quote from some book (or movie), or simply a commentary on what one sees today in public - mainly phone zombies. But if the latter, I'm not sure about an hour. I think a single notification suffices in most cases.
Wait a minute lcamtuf.substack.com/p/zombies