1274
Women who were born between 1971 and 1975 had the highest rate of rubella nonimmunity ( 9 . 5 % ) .
 Disease: rubella
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Disease: rubella