Sentence examples for cause is unknown from inspiring English sources

Sometimes, the cause is unknown.

The cause is unknown pending an autopsy.

For the majority the cause is unknown.

In most cases the cause is unknown.

So far, the cause is unknown.

Its cause is unknown, its progression unpredictable.

Its cause is unknown, and there is no effective treatment.

In the remaining cases, the cause is unknown.

Its cause is unknown, and currently there is no cure.

Deaths are to be reported when the cause is unknown.

For around one third of phobia sufferers, however, the cause is unknown.