I know what you are thinking: Why on earth would a blood bank site define the word “resident?” This definition is specifically applicable in the context of the consideration of deferral of potential blood donors for risk of transmission of malaria, and it comes from the 2013 guidance issued by the United States Food and Drug Administration (FDA). A “resident” of a malaria-endemic country is someone who has “a continuous stay of longer than 5 years in a country or countries having any malaria-endemic area…” (as defined by the US Centers for Disease Control (CDC). This definition is in contrast to that of a “traveler,” who visits an endemic area for more than 24 hours but less than 5 years.