How would a vaccine prevent someone getting an infection?
Vaccines are made of dead or inactive pathogens. White blood cells in the body come into contact with the pathogen and produce antibodies which destroy the pathogen. The body produces memory cells which means when it is reinfected by the pathogen, it can quickly produce antibodies to destroy the pathogen before symptoms develop.
ND
Related Biology GCSE answers
All answers ▸When playing football, a footballer's body temperature increases. Explain how the brain monitors body temperature
Describe the reflex arc from the point of a receptor detecting a stimulus.
What is a synapse?
In a fish and chips shop, the potatoes are cut hours before they are cooked, but they must not dry out. To stop this, the owner soaks them in a salt solution. Define the process of osmosis and explain what would happen if you used distilled water.