二类疫苗
二类疫苗-
新政策要求二类疫苗必须通过省级采购平台招标，而现在只有少数省份建立起招标采购平台。
The new policy requires vaccine tenders to be conducted via provincial procurement platforms , which have been set up by only a few provinces .
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二类疫苗短缺的部分原因还在于它们不再是地方疾控中心的收入来源，这让后者不太愿意保持库存。
Contributing to the shortage is the removal of Class II vaccines as a source of revenue for the local CDCs , which makes them less willing to hold stocks .
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短缺的主要是“二类”疫苗。与政府强制要求接种的“一类”疫苗不同，“二类”疫苗是自愿选择接种、并且是自费的，是疾控中心的主要收入来源。
The shortages have mostly hit " Class II " vaccines which - unlike state-mandated Class I vaccines - are optional and paid out of pocket and were a main source of revenue for the CDCs .