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 ▸Explain how you may test a plant specimen for starch?
Describe how living things are involved in the constant cycling of carbon.
How does temperature affect enzyme activity
In fruit flies, the allele (n) for a black body is recessive to the allele (N) for grey body. What would the next generation look like with two heterozygous parents.