Diagnosis: Unknown

A Minnesota mother takes her son to the hospital with signs of food poisoning. While he is being treated, she comes down with the same symptoms. Soon, the Minnesota Department of Health is flooded with calls of food poisoning and launches an investigation. They pinpoint the source to a single restaurant and unwashed and unrefrigerated parsley.

On the tiny resort island of Martha's Vineyard, landscaper, Patrick Ryer, suffers from chills and high fever. Patrick has contracted Tularemia, a rare bacterial disease. Health officials alert residents and tourists who crowd the Vineyard over the summer holiday. Over the next month, ten more people are diagnosed with the disease, including other landscapers and children.

"Island Fever" highlights the details of the Dengue Fever outbreak that occurred in the Hawaiian Islands in the spring of 2001. The Pacific Disaster Center's field data collection capability enabled the Centers for Disease Control and Prevention to pin-point Dengue outbreak locations, and work toward eradication of this mosquito-borne virus in the islands.

For months, members of the McGuire family suffer from chronic illnesses, bronchitis, pneumonia and abdominal pains, fever and chills. When Amy McGuire's respiratory ailments don't respond to any treatment, her parents become alarmed. Amy's mother watches a report on television warning of the dangers of mold in houses.

In December of 1979, a young girl passes out on a bus in Wisconsin. She is taken to the hospital complaining of a sore throat, fever and aching muscles. Doctors believe she has the flu, until her blood pressure drops and her kidneys begin to fail. When additional women begin exhibiting similar symptoms, which bring them close to death, doctors fear an outbreak of toxic shock syndrome.

In 1993, aquatic researcher Joanne Burkholder suffers an array of troubling symptoms while working in her North Carolina State University lab. A fellow researcher confides that he has recently been plagued by bizarre medical problems including memory loss, confusion, numbness and a burning sensation on the skin, symptoms identical to Burkholder's.