Travel to endemic areas is a risk factor for<unk> . For travelers, regions associated with the highest estimated relative risk of infection are West Africa and Oceania.  Human behavior, often dictated by socioeconomic situations, can influence the risk of<unk>  for individuals and communities.  In addition, children and pregnant women are at a higher risk of contracting<unk> .  Certain biologic characteristics can protect against particular types of<unk> . Two genetic factors, the sickle cell trait and absence of Duffy blood group, have been shown to be epidemiologically significant.
Malaria risk factors
Dengue fever risk factors
Ebola risk factors
Filariasis risk factors
Lassa fever risk factors
Influenza risk factors
Leptospirosis risk factors
Hantavirus infection risk factors