Vaccinations are required prior to traveling to many foreign locations;the goal of vaccination is to create populations of memory cells,so that any future exposure to the pathogen produces a secondary rather than primary response.

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Vaccinations aim to stimulate the immune system to create memory cells specific to the pathogen, which can provide a rapid and effective response if the pathogen is encountered again in the future. This secondary response is faster and more robust than the initial, primary response which occurs during the first exposure to the pathogen. Therefore, the goal of vaccination is to create populations of memory cells to protect against future infections.

Vaccinations Are Required Prior to Traveling to Many Foreign Locations;the