Vaccination
Vaccinations give protection against specific diseases and boost the body’s defence against infection from pathogens without the need to be exposed to dangerous diseases that can lead to death
The level of protection in a population depends on the proportion of people vaccinated
Vaccines allow a dead or altered form of the disease-causing pathogen, which contains specific antigens, to be introduced into the body
In this weakened state, the pathogen cannot cause illness but can provoke an immune response
Lymphocytes produce complementary antibodies for the antigens
The antibodies target the antigen and attach themselves to it in order to create memory cells
The memory cells remain in the blood and will quickly respond to the antigen if it is encountered again in an infection by a ‘live’ pathogen
As memory cells have been produced, this immunity is long-lasting
Questions :
How have vaccinations contributed to the eradication or reduction of infectious diseases globally, and what are some of the most notable examples of their success?
What is the purpose of a vaccine?
1.What preservatives are used in vaccine?
2. Are vaccines safe?
3. Do vaccines provide better immunity than natural infections?
4. Why do some vaccines require boosters?
5. Can babies immune systems handle so many vaccines?
6. Do we do enough safety testing with vaccines?
7. Is the polio vaccine linked to HIV? Or to cancer?
8. Do vaccines have aborted fetal tissues?