Immunisation (Edexcel GCSE Biology Combined Science): Flashcards
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Definition of immunisation
Definition of immunisation
Introducing pathogen to stimulate immune response w/o illness
What vaccines are made from
What vaccines are made from
Inactive/dead pathogen or its antigens
Why inactive pathogens don't cause disease
Why inactive pathogens don't cause disease
Inactive but still contain antigens for immune recognition
Role of lymphocytes in immunisation
Role of lymphocytes in immunisation
Recognize antigens & trigger immune response, produce antibodies
Memory lymphocytes function
Memory lymphocytes function
Remember pathogen & produce antibodies quickly if re-exposed
Herd immunity definition
Herd immunity definition
High % vaccinated reduces spread, protecting unvaccinated people
Key advantage of immunisation
Key advantage of immunisation
Prevents illness by preparing immune system
Disease wiped out by immunisation
Disease wiped out by immunisation
Smallpox
Disadvantages of immunisation
Disadvantages of immunisation
Not 100% effective, mild side effects, rare allergic reactions
Why rashes may form post-vaccination
Why rashes may form post-vaccination
Antibodies reacting with antigen in body/skin