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
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:
 Chemical: hepatitis B surface antigen; Disease: hepatitis B