1847
Cost - effectiveness ratios rise with age at vaccination ; an alternative intervention that vaccinates adults with diabetes 60 years of age or older had a cost - effectiveness ratio of $ 2 . 7 million per QALY .
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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:
 None