Immunization vs Vaccination

While I was working on the Project Personal Medical Records, I realized  I should use the word “vaccination” rather “immunization” on Part 1 of the history, or put a slash or hyphen between the two words (if this be the case, put vaccination before immunization).

Although vaccination and immunization are used interchangeably, they are not exactly the same.

Immunization v. Vaccination

Immunization means to make someone immune to something. Vaccination, by contrast, according to Dorland’s Medical Dictionary, just means to inject “a suspension of attenuated or killed microorganisms…administered for prevention…or treatment of infectious disease.”


  • No vaccine is 100% effective in preventing disease.
  • Since no vaccine is 100% effective, vaccination does not automatically mean the person is immunized against the disease.




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