At present, the cause of the disease is unknown.

Maybe that's because I had trouble sleeping last night.

Walter her disease. if there's no cure

My father, who I've been talking about, died of AlDS in 1999.

He resigned his post on account of illness.

He was absent owing to illness.

You've made Mama very sick.

Filth breeds illnesses.

Are designed to release

Illness cut short his vacation.

He was absent because of illness.

For my daughters. They're sick.

Illness made him give up his studies.

This gentleman, he helped me.

I am depressed by my illness.

Illness prevented me from coming to school.

I didn't go on account of illness.

At first, I thought they were sick.

At first, I thought I was sick.

At first, I thought he was sick.

At first, I thought she was sick.

Because of illness, he was obliged to give up smoking.

Illness made him give up his studies.

His absence was due to illness.

His illness stems from his intemperance.

He was absent from school because he was sick.

He was absent from school because of illness.

I was absent from school because of illness.

I was absent from school because I was sick.

Tom had no appetite because of his illness.

She was absent on the ground of illness.

On account of illness he absented himself from school.

Illness prevented him from doing his work.

Illness prevented me from going to his concert.

You're ill and dying.

My illness kept me from starting.

Illness prevented me from going out.

She was unable to come because of illness.

Sickness prevented him from going out.

She could not come on account of illness.

She was absent from school owing to sickness.

He could not come on account of illness.

The rock concert was called off because the singer fell ill.

Because of illness, she couldn't come.

Apparently, he'd been sick for some time.