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群体免疫
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群体免疫
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群体免疫
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herd immunity
群体免疫
根据某种传染病流行区域与人群发病等流行病学特点,在人群中进行大规模的疫苗或菌苗接种以预防和控制其传播流行的措施。又称社区免疫。
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electric quadrupole moment
electric quadrupole radiation
electric quantity
Electric quantity Sensor
electric railway
electric reactor
electric regulatory systems
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electric resistance
electric resistance vacuum gauge
electric-resistance welded steel pipe
electric resonance
electric response audiometry
electric rotating machinery
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electric shock resistant protector
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