1271
All infants who were born to hepatitis B surface antigen - positive mothers also received hepatitis B immune globulin .
 Chemical: hepatitis B surface antigen; Disease: hepatitis B
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: hepatitis B surface antigen, hepatitis B 
Answer:
 Chemical: hepatitis B surface antigen; Disease: hepatitis B