10954
Through identification of the microbial components responsible for protective immunity , vaccine formulations can be simplified , enabling molecular - level vaccine characterization , improved safety profiles , prospects to develop new high - priority vaccines ( e . g . for HIV , tuberculosis , and malaria ) , and the opportunity for extensive vaccine component optimization .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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