I’ll actually give Jurassic Park a pass on this one. Ian Malcom was a mathematician, not a biologist, wasn’t he? And kind of a douchebag, at least if the movie was anything to go by. Entirely in-character for him to assume it justified a ‘meddling in God’s domain’ argument for something he didn’t approve of.
Quibbling aside, the only example I can think of is that sloppy love letter to 80’s SF movies, Doomsday. Scotland is walled off and quarantined after a horrific, fast spreading plague breaks out there. 20 years later, after the cute little girl escapee has had time to grow into the impossibly sexy Rhona Mitra, the plague brakes out again. So, of course she’s sent back to find a cure from the few surviors.
Only there isn’t a cure. The survivors are the rare and lucky ones who were resistant to the plague, and they passed that resistance to their children. And any children who weren’t resistant would have died soon enough. The creepy guy who runs the ‘sustainable technology’ tribe explains this, and I think he got everything right.
They do extract someone at the end, and claim they can synthesize a serum from her. But the guy saying that is a decent bloke who may have just been trying to rescue her. That might even be plausible, I’m not a future-virus-ologist.
It’s a fun movie, if you like that kid of thing. It has fun with all the great 80’s SF tropes, and it avoids all of the ‘she’s tough EVEN THOUGH SHE’S A GIRL!!’ traps that this kind of movie tends to fall into. And everyone involved is clearly having a blast.
Plus, theres a bit where Mitra’s wrists are cuffed over her head while she’s in a wifebeater and all shiny with sweat. So . . . yeah.