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.
當初它被譽為一款突破性的登革熱疫苗；登革熱是一種不受重視的熱帶疾病，每年造成約2萬人死亡。就在賽諾菲巴斯德(Sanofi Pasteur)生產的登革熱疫苗“Dengvaxia”面向菲律賓80多萬名學童進行大規模接種的過程中，陸續有報告稱，接種疫苗的一些兒童得了重病，有些甚至死亡。
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