The World Health Organization has given an insight on how vaccines are developed. WHO stated that vaccines usually constitute the tiny fragments of the disease-causing organism or the blueprints for making the tiny fragments. Vaccines however contain other ingredients such as antigen, preservatives, stabilizers, surfactants and residuals.
According toWHO, antigen is the active component in vaccines which gives immune against diseases. The antigen could as well constitute the unrefined component for making the active component.
WHO noted that the use of stabilizers also guard against chemical reactions and prevent the vaccine from clustering to the vial. The World Health Organization said that the ingredients used in making the vaccines combine together as a result of surfactants, which prevent the ingredients from forming lumps.
The World Health Organization stated that preservatives like 2-phenoxyethanol are active ingredients which prevent the vaccine from getting contaminated after opening the vial has been opened, in cases where it is been used to vaccinate more than one person at a time. The only exception is where the vaccines are stored in one-dose vials and are discarded after the single dose is administered. .
The World Health also maintained that there are various quantity of ingredients used in producing vaccines which are non-active ingredients like yeast, egg protein etc.
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