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Immunization against vaccine preventable diseases is essential to reduce the child mortality, morbidity and handicapped conditions. It is mass means of protecting large number of children from various diseases.
Immunization is the process of protecting an individual from diseases through introduction of live /killed/attenuated organisms in the individual system.
· Hepatitis B
· Yellow fever
· Haemophilus influenza Type B
· Meningococcal meningitis
· Pneumococcal Pneumonia
· Rotta virus
The cold chain system is necsessary, because vaccine failure may occur due to store and transport under strict temperature controls.
The cold chain is a system of storage and transport of vaccines at low temperature from the manufacturer to the actual vaccination site.
The cold chain equipment consists of:
· Walk in cold rooms
· Deep freezers
· Ice lined refrigerator
· cold boxes
· Vaccine carriers
· Dry carriers
· Ice packs
For successful cold chain system, cold chain equipment, transportation system and motivation and training of t he workers for maintenance of cold chain link are essential.
· Freezer – polio and measles
· Cold compartment – DPT, DT,TT,diluents, typhoid and BCG
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