For an immunisation program to be successful, a suﬃcient number of people need to be vaccinated-a phenomenon called ..... immunity to protect those who cant be immunised for various reasons-very young or old and immune suppressed.

VACCINATION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

For an immunisation program to be successful, a sucient number of people need to be vaccinated-a phenomenon called ____ immunity to protect those who can’t be immunised for various reasons-very young or old and immune suppressed.

A	suppressed
B	passive
C	herd
D	corrective

Explanation:

Detailed explanation-1: -Vaccines contain antigens that stimulate the immune system to produce an immune response that is often similar to that produced by the natural infection. With vaccination, however, the recipient is not subjected to the disease and its potential complications.

Detailed explanation-2: -Scientists estimate that in order for herd immunity to be effective, about 70-90 percent 3 of a population need to be immune to a disease, either by contracting the disease and recovering or getting a protective vaccine. This reaches what the World Health Organization (WHO) calls the herd immunity threshold .

Detailed explanation-3: -Vaccines reduce risks of getting a disease by working with your body’s natural defences to build protection. When you get a vaccine, your immune system responds. We now have vaccines to prevent more than 20 life-threatening diseases, helping people of all ages live longer, healthier lives.

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IMMUNOLOGY

HYPERSENSITIVITY

VACCINATION