Plague is a film without special qualities - average director, script, actors. It's not bad though. The action, although standard for this type of films, holds the viewer's interest. Of course, the whole "scientific" part of the movie only sounds scientific and can only mislead a person who has no concept of bacteriology, but this is also standard for this type of films. The so called bacteria in the videos is in fact Paramecium - you can get it in the nearest swamp and studi it in a standart microscope. Don't expect action, don't look for special effects. Actors play average and you won't see known faces.
All in all, if you like 70s thrillers, you won't regret it.
All in all, if you like 70s thrillers, you won't regret it.