5201
Nevertheless , its trans - mucosal limited absorption and the scarce contact time of the formulation with the mucosal surface - especially in the ocular mucosa - constitute a big limitation of the antiviral efficiency .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None