Health officials hunt for the source of an outbreak of Legionnaires' disease
A fatal blood disorder kills 21 people in New Mexico and five other states
After a specialist reports two patients with neurological disorders, further cases appear
Apparently unrelated outbreaks of shigellosis baffle health officials
Tularemia is on the government's watch list of bioterrorism agents
An Ontario hospital is flooded with patients who have contracted a deadly strain of E. coli.
An outbreak of dengue fever infects nearly 200 people
An investigation leads to a mold that causes pulmonary hemorrhaging
A healthy 17-year-old model dies suddenly and Dr. Bullard suspects bacterial meningitis
A healthy 14-year-old girl and two older women die from the same mysterious illness
A middle-aged woman dies of cryptococcal meningitis, the first such death in British Columbia
A community gets skin lesions and memory loss that eventually is linked to pfiesteria
An invasive bacteria infects a baby in Texas, and doctors rush to save her
A Texas hospital suspects a connection between a nurse and an increase in its death rate.
A crisis team determines that 550 school children may have been exposed to meningitis
Deaths during male nurse Donald Harvey's shifts
A doctor amasses a death toll that makes him one of history's most prolific serial killers
Tests reveal the presence of poison in an ill man's body
A man contracts a mysterious and violent stomach illness
A business partner is suspected when a man contracts a rare lung infection
Doctors discover that a man renovating a house has been poisoned with thallium
Doctors suspect that a woman is being poisoned
Two hundred thousand people fall ill in the country's largest case of single-source food-poisoning