Explain how a vaccination prevents infection [3 marks]
The main way in which vaccinations prevent infection is by causing white blood cells to produce antibodies. These antibodies are produced rapidly upon re-infection and kill the pathogens.
OF
Related Biology GCSE answers
All answers ▸What is an antibiotic and how does it work?
Explain how transcription of genes occurs
How many nucleotides code for an amino acid in protein synthesis?
A scientist is researching the effect of an energy drink on a group of twenty men. State two characteristics of the sample which may influence the results.