vaccination

• vaccination:

  • contains a dead or inactive form of a pathogen
  • stimulates wbcs to produce antibodies complimentary to the antigens on the pathogen
  • if you are infected again, memory cells will produce these antibodies at a faster rate
  • immunity
• herd immunity:

  • immunizing a large proportion of the proportion
  • spread of the pathogen is reduced as there are less people to cath the disease
• advantages of vaccines:

  • eradicated many diseases so far
  • reduced the occurrence of many diseases
  • epidemics can be prevented through herd immunity
• disadvantages of vaccines:

  • not always effective in providing immunity
  • bad reactions can cause in response to vaccines