Acquired immunodeficiency syndrome (AIDS) has become a health disaster of pandemic proportions, with some 40 million people living with AIDS or the HIV virus that causes it.

• 后天免疫机能丧失综合症（艾滋病）已成为广泛流行的健康灾难，艾滋病患者或导致艾滋病的艾滋病毒携带者有大约4 000万人。