herpes simplex infectious disease lip disorder herpes labialis https://github.com/monarch-initiative/mondo/issues/3348 labial Herpes simplex SCTID:1475003 cold sore UMLS:C0019345 blisters, fever herpes labialis Sore, cold fever blister blister, fever MESH:D006560 fever blisters NCIT:C34695 MONDO:0043653 Sores, cold Herpes simplex, labial cold sores MEDGEN:5533 A lesion caused by type 1 or type 2 herpes simplex virus, typically involving the oralfacial region. disease arising from reactivation of latent virus