He is suffering from alopecia.

My sister has celiac disease, so she can't eat foods that contain gluten.

He is showing symptoms of catatonia.

His child is suffering from rickets.

He was diagnosed with mental illness.

My daughter caught fifth disease last week.

My grandmother is suffering from Alzheimer's disease.

He developed an occupational disease due to years of construction work.

She had been nursing her father for a long time.

He has laughing sickness, and he can't stop laughing.