Five Feet Apart

There’s this new movie coming out soon called Five Feet Apart. Watching the trailer it seems that this a romance movie about two cystic fibrous patients who have to stay at least five feet apart. Did I misunderstand the trailer? Is this true? Why?

So, I Googled this, and saw an article about it. Looks like there’s a cross-infection guideline that says CF patients should keep six feet apart. But the couple in this movie just want to be one foot closer together.