It was hailed as a breakthrough vaccine for dengue fever, a neglected tropical disease that kills about 20,000 people each year. Dengvaxia, made by Sanofi Pasteur, was being rolled out to more than 800,000 schoolchildren in the Philippines when reports began trickling in of vaccinated children falling seriously ill, and some dying.
当初它被誉为一款突破性的登革热疫苗；登革热是一种不受重视的热带疾病，每年造成约2万人死亡。就在赛诺菲巴斯德(Sanofi Pasteur)生产的登革热疫苗“Dengvaxia”面向菲律宾80多万名学童进行大规模接种的过程中，陆续有报告称，接种疫苗的一些儿童得了重病，有些甚至死亡。
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