First is a sci-fi type I saw when I was a kid probably pre 86. The only scene I can remember is a guy and a girl in some type of space ship or facility, and there are vertical cryogenic type chambers with reproductions or clones of the guy and I think there was dry ice fog all around, I remember the guy looking like Lance Guest from the Last starfighter (white guy with a fro) but it isn't him. And I think I remember something about a tiny flying saucer.
For some reason this makes me think of "Nightflyers."
The other one also from the early or mid 80's had a scene with multiple people underground, in some shelter maybe. They are fighting with each other because they all have some special antibody or something that is keeping them alive and one of them gives someone else a transfussion that will cause the giver to die.
"Transmutations" is a good suggestion for this. There are a group of mutants created by a white liquid that is injected into people by a mad scientist. Most of the mutations give them big bumps on their faces, and they need regular injections of the white liquid to survive. The mutants all live underground in a shelter lit by a lot of neon lighting. There is a private eye looking for his lost girlfriend (kidnapped by the mutants). The girlfriend has been injected with the drug, but she does not mutate. She just runs around wearing a filmy white dress and a white veil. There are a bunch of European mafia types who want to kill the mutants, and at one point there is a big gun battle with the mutants trapped in a building and the mafia guys outside shooting in.
"Transmutations" reminds me a lot of "Nightbreed," and both were based on Clive Barker stories.
EDITED TO CORRECT TITLE ERROR.