AQA - Biology - Vaccinations

What is the primary purpose of vaccination?

• To cure diseases

• To prevent diseases

• To diagnose diseases

• To treat symptoms

Which of the following best describes herd immunity?

• Immunity achieved by vaccinating a small portion of the population

• Immunity achieved when a large portion of the population becomes immune to a disease

• Immunity achieved by natural infection only

• Immunity achieved by isolating infected individuals

What does vaccine efficacy measure?

• The cost of producing the vaccine

• The percentage reduction of disease in vaccinated individuals compared to unvaccinated individuals

• The number of doses required for immunity

• The side effects of the vaccine

What is the herd immunity threshold?

• The minimum number of people who need to be vaccinated to stop the spread of a disease

• The maximum number of people who can be infected at one time

• The number of people who have natural immunity

• The number of people who need to be isolated to prevent an outbreak

Which of the following is a common side effect of vaccines?

• Severe allergic reactions

• Mild fever

• Chronic illness

• Permanent disability

How is the effectiveness of a vaccine typically tested?

• By observing the immune response in a laboratory setting

• By conducting clinical trials with human volunteers

• By testing on animals only

• By analysing historical data

Why is it important to achieve herd immunity?

• To eliminate the need for future vaccinations

• To protect those who cannot be vaccinated

• To increase the cost of healthcare

• To ensure everyone gets infected

Which of the following factors can affect the herd immunity threshold?

• The cost of the vaccine

• The mode of transmission of the disease

• The colour of the vaccine

• The packaging of the vaccine