正压防护服（英语：Positive pressure personnel suits，缩写：PPPS）是一种完全密封的工业级防护服，一般只在最高级别的生物安全等级实验室（BSL-4）内穿着。这些设施内有高度传染性的危险病原体，可能当时没有可用的治疗手段或疫苗。即使防护服出现破损，也能阻止穿戴者被感染[1]。
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