HYPERSENSITIVITY
VACCINATION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
When a group of animals become immune to an illness
|
|
|
The number of people someone with an infection can possibly spread the illness to
|
|
|
Becoming immune to a vaccine and having it not work
|
|
|
When a large amount of people protect those who haven’t gotten vaccinated
|
Detailed explanation-1: -Herd immunity occurs when a large portion of a community (the herd) becomes immune to a disease. The spread of disease from person to person becomes unlikely when herd immunity is achieved.
Detailed explanation-2: -The more infectious a disease, the greater the population immunity needed to ensure herd immunity. For example, measles is highly contagious and one person with measles can infect up to 18 other people. This means that around 95% of people need to be immune in order for the wider group to have herd immunity.
Detailed explanation-3: -Herd immunity applies to immunisation or infection, human to human transmitted or otherwise. On the other hand, herd effect applies to immunisation or other health interventions which reduce the probability of transmission, confined to infections transmitted human to human, directly or via vector.