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Malaria immunity in individuals previously resident in a malarious area

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

  • people who live and remain in malarious areas develop immunity against malaria after repeated infections. However this immunity is not life-long
    • if a person migrates from a malaria endemic area to a non-malarious area it is not possible to give a precise time when such immunity is lost
      • in some instances immunity has been observed to have been lost after 6 months in a non-malarious area and one would expect that immunity would have practically been lost by 2 years (1)
      • in light of this, the advice is for malaria chemoprophylaxis and mosquito bit prevention to be used by all immigrants visiting their home country (malarious area), irrespective of the time period they have been away from their home country

Reference:

  1. Pulse 2005;65(34): 50.

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