Vaccine-preventable disease

[citation needed] The most common and serious vaccine-preventable diseases tracked by the World Health Organization (WHO) are: diphtheria, Haemophilus influenzae serotype b infection, hepatitis B, measles, meningitis, mumps, pertussis, poliomyelitis, rubella, tetanus, tuberculosis, and yellow fever.

[4] With 100% immunization, and 100% efficacy of the vaccines, one out of seven deaths among young children could be prevented, mostly in developing countries, making this an important global health issue.

[3] Four diseases were responsible for 98% of vaccine-preventable deaths: measles, Haemophilus influenzae serotype b, pertussis, and neonatal tetanus.

A vaccine that is generally recommended may be medically inappropriate for a small number of people due to severe allergies or a damaged immune system.

Every country makes its own immunization recommendations, based on the diseases that are common in its area and its healthcare priorities.