Haemorrhage
Hair jellyfish
Halofantrine
Hantavirus
Hapalochlaena spp.
Heat
Helminths
Hendra virus
Hepatitis
Hepatitis viruses
Hepatozoon
Herd immunity
Herpes simplex virus
Herpes zoster virus
Heterophil antibody
Hexacanth
Histoplasmosis
HIV (Human immunodeficiency virus)
Holoendemic
Hookworm
Hormone
Host
Host preference
Host range
Hydatid
Hydatid sand
Hydroid
Hydrophiidae
Hydrozoa
Hyperendemic
Hypersensitivity
Hypertension
Hypnozoite
Hypoendemic
Hypotension
Hypoxia