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Effective vaccines are available for viruses such as poliovirus and tick - borne encephalitis virus ( TBEV ) and for the childhood diseases morbilli ( measles ) , rubella ( German measles ) , parotitis ( mumps ) and varicella ( chickenpox ) .
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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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