At the age of 43 (in 1942) he began suffering from an unknown disease, losing his voice and memory.

She died in 1982 of a serious disease still unknown.

Tan died in 1850 at the age of 52, after catching an unknown disease.

He caught an unknown disease at the age of 17 and fell very ill.

"You make it sound like we're a guy with an unknown disease and no known cure."

An unknown disease suddenly begins to attack plants, then animals.

At the age of 43 (in 1942) he began suffering from an unknown disease.

Her child soon died of an unknown disease as well.

He had been suffering from an unknown disease for several years, caught a cold, and died ten days later.

In 1754, his wife died from an unknown disease.