As a printed, on-screen explanation reveals at the film's end, after Diana's death her illness was diagnosed as chronic fatigue and immune dysfunction syndrome.

To the Editor: Re "Placebos Fail the Test": The article highlights the widespread misconceptions about chronic fatigue and immune dysfunction syndrome.

Others, including the Chronic Fatigue and Immune Dysfunction Syndrome Association of America, maintain that an immunological disorder is the main problem in chronic fatigue.

(Today, chronic fatigue syndrome also is known as myalgic encephalomyelitis, postviral fatigue syndrome, and chronic fatigue and immune dysfunction syndrome.)

The CFIDS Association of America works to build support for people suffering from chronic fatigue and immune dysfunction syndrome (also known as chronic fatigue syndrome).

CFIDS CFS Chronic Fatigue and Immune Dysfunction Syndrome None Chronic fatigue syndrome (CFS) is a complex disorder characterized by profound fatigue and other related symptoms.