VOA慢速英语2016.09.20 yellow, public, people, levels, 科学家

Rebecca949

Reaserchers say public mistrust of vaccines is causing diseases like measles and yellow fever to spread. The scientists said the lower levels of trust can lead to people refusing vaccines. ___________________________ 研究人员认为公众对疫苗的信任危机导致了麻疹,黄热病等疾病的传播。科学家说越来越低的信任水平会导致人们拒绝打疫苗，______________________

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