Use of prophylaxis for malaria by American travelers to Africa and Haiti.
D000328:Adult; D000349:Africa; D004363:Drug Utilization; D006205:Haiti; D006801:Humans; D007255:Information Services; D008288:Malaria / Q000517:prevention & control*; D010963:Plasmodium falciparum; D012306:Risk; D011795:Surveys and Questionnaires; D014195:Travel; D014481:United States