1855
HBsAg , anti - HBs , anti - HBc , and anti - HIV 1 / 2 were determined as part of routine diagnosis using Axsym assays ( Abbott Laboratories , North Chicago , IL ) .
 Chemical: HBsAg
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: HBsAg 
Answer:
 Chemical: HBsAg