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World Immunization Week is a global public health campaign to raise awareness and increase rates of immunization against vaccine-preventable diseases around the world. It takes place each year during last week of April.Immunization can protect against 25 different infectious agents or diseases from infancy to old age including diphtheria measles pertussis polio and tetanus. The World Health Organization (WHO) estimates active immunization currently averts 2 to 3 million deaths every year.


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