吸血之疾可以用英语表示为 "vampirism". 这个词来源于拉丁语 "vampirus"，意思是吸血鬼。例句：
The legend of vampires has been around for centuries. 传说中的吸血鬼已经存在了几个世纪。
Some people bepeve that vampirism is a real medical condition. 有些人认为吸血之疾是一种真实的医学疾病。
In folklore, vampires are often depicted as immortal creatures who feed on the blood of the pving. 在民间传说中，吸血鬼通常被描述为不死的生物，它们以活人的血液为食。