Middle East respiratory syndrome is a viral infection that causes severe pneumonia.

She was diagnosed with Alice in Wonderland syndrome.

Sudden Infant Death Syndrome refers to the sudden death of an infant for which the cause remains unknown.

He is ill with a severe cold.

He is suffering from a serious sickness.

She is my best friend.

She is my best friend.

They (girls) study at the library every day.

A cyst was found in her kidney.

She had her ovaries checked by a doctor due to a problem.