In early of 2002, Mahmood was admitted into a military hospital due to an unexplained illness.

But the baby died of an unexplained illness within a few weeks after birth.

Four days after the meteorite impact and the unexplained illness, most villagers reported having recovered.

Another child in the family has had unexplained illness or death.

Rizzuto said his health was good despite a recent unexplained illness.

Since then he has been diagnosed with many "unexplained" and life threatening illnesses that a normal person should not have.

Mothers describe the horror of losing infants to unexplained illnesses.

The three transplant recipients developed an unexplained illness after transplantation and later died.

More than 67,000 filed disability claims for environmental sickness, unexplained illness, and other ailments.

A family history of similar or unexplained illness or death in a sibling.