因麻疹疫苗的发明与广泛应用，现在工业化国家的人们不再认为麻疹是对公共卫生的威胁，但该病在世界范围内每年仍导致１００万以上人的死亡。许多受害者是发展中国家未接受预防接种的儿童，还有些是接种了因未冷藏保存的无效疫苗，或是由于被接种者是不到９个月的婴儿。 现在科 Because of the invention and widespread use of measles vaccine, now that people in industrialized countries no longer consider measles as a threat to public health, the disease still causes more than 1 million deaths each year in the world. Many of the victims are children in developing countries who have not been immunized, others vaccinated for vaccines that are not refrigerated, or infants who have been vaccinated for less than nine months. Now Branch