Movie name? Alien monster escapes its cell in a spaceship and kills everyone except one woman?

Seen the movie around 14 years ago. Here is plot as I remember it. There is an alien monster being held on a spaceship. Something goes wrong and the containment fails. It escapes and starts killing everyone. One woman survives and escapes to earth but alien follows her. She tries to find help to fight it. Every time she sees the monster, she forgets details how to stop it. Monster is never shown in actual form, but it jumps from body to body as it searches for her.