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Key Questions:

1. How do vaccinations prevent illness in an individual and the spread of disease in a population?
   • Vaccinations prevent the illness in an individual by stimulating the white blood Cells to produce antibodies making the immune system quicker to respond if infected with the virus. Vaccinations reduce the wide spread of infectious diseases caused by viruses.
2. What are the advantages and disadvantages of using vaccinations to prevent disease?
   • The advantages of using vaccinations to prevent disease are that less people will be infected by the disease, the disease will not spread as far and the cost of a vaccine is usually cheaper than treating an ill person. The disadvantages are that some people will still suffer with the illness (different strains or not full effects), there are posisble side affects of the vaccine and vaccinations cost NHS/people money.
3. What is in a vaccine?
   • A vaccination is a small quantity of dead or inactive forms of a pathogen
4. How does a vaccination work?
   • The vaccination causes the body to stimulate the white blood Cells to produce antibodies. If the same pathogen re-enters the body the white blood Cells respond quickly to produce the correct antibodies, preventing infection.