7412
The stabilizing effect of seeds after harvest allows recombinant subunit vaccines and antibodies to be delivered via the mucosal route as they are better able to withstand the harsh microenvironment when protected by the plant matrix .
 None
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities:  
Answer:
 None