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

She was diagnosed with Alice in Wonderland syndrome.

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

He is suffering from a serious sickness.

He is ill with a severe cold.

A cyst was found in her kidney.

They (girls) study at the library every day.

She is my best friend.

She is my best friend.

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