3 Vaccination

Question 1

How do vaccinations work

Answer 1

Dead or inactive pathogens are used to trigger the production of antibodies by white blood cells if the same live pathogen then enters the body the white blood cells will rapidly mass produced the right antibodies to kill it so that the person doesn’t get ill

Question 2

If enough people are immune to a particular pathogen what does that mean

Answer 2

The spread of the pathogen is reduced

Question 3

What are the pros and cons of vaccinations

Answer 3

Pros:
-they’ve helped control lots of infectious diseases e.g. No more smallpox
-epidemics can be prevented if a large percentage of the population is vaccinated
Cons
-doesn’t always work
-sometimes you can have a bad reaction like swelling but they are very rare