H5

H5, H05 or H-5 may refer to:

==Science== Influenza A virus subtype H5 (disambiguation), all A type viruses containing H5 type of agglutinin Histone H5, a histone similar to Histone H1 Haplogroup H5 (mtDNA), a genetics subgroup ATC code H05 Calcium homeostasis, a subgroup of the Anatomical Therapeutic Chemical Classification System British NVC community H5 Hydrogen-5 (H-5), an isotope of hydrogen H05, an ICD-10 code for diseases of the eye and adnexa