O-glycans are also linked to avian influenza [57]. Mucosal O-linked glycans are furthermore associated with herpes simplex virus 1 infection [58]. Mucin type O-glycan biosynthesis miR pathways have been identified in avian oncogenic retrovirus (Avian leukosis virus subgroup J (ALV-J)) [59]. This KEGG pathway is therefore related both to human as well as veterinary viral infections and further studies will be needed to establish the function of miR-5197 during SARS-CoV-2 infection.