A form of blood which is separated from coagulant (fibrinogen) and shaped elements (erythrocyte, leukocyte, thrombocyte) of blood. To obtain serum, the blood is allowed to clot without adding any substance to the blood and then the clot (cellular part) is allowed to precipitate.

Substances that protect the vaccine during storage and transport.

Bacteria that cause diseases such as otitis media, pneumonia, bloodstream infections, meningitis.

Medication administered into subcutaneous tissue.

Vaccination campaigns aiming to reach and immunize most of the susceptible children and the adult population.

Continuous and systematic collection, analysis, and interpretation of data about the disease in order to make necessary responses to the disease on a social scale.

The mixture obtained through dispersion of the solid drug substance in small particles in a liquid.