Vaccination (4.3.1.7) — AQA GCSE Biology Revision Notes

Revision notes for AQA GCSE Biology specification point 4.3.1.7, Vaccination.

Vaccination

VACCINATION is a proactive approach to prevent diseases rather than treating them after infection.

How VACCINATIONS Work:

  • VACCINATIONS work by introducing DEAD or INACTIVE pathogens into the body.
  • These pathogens carry ANTIGENS which prompt the LYMPHOCYTES (white blood cells) to produce ANTIBODIES without the actual disease occurring.
  • The lymphocytes stay in the body as MEMORY CELLS, so if the actual pathogen was to ever enter the body, they would RAPIDLY produce a LARGE VOLUME of antibodies to eradicate the pathogens and prevent illness.
  • The MMR VACCINE is an example that combines weakened versions of the viruses causing measles, mumps, and rubella.

 Vaccination 

There are advantages and disadvantages to vaccinations:

Vaccinations

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