SUBJECT INCLUSION CRITERIA: 6 months of age and above Known resident of Maferinyah sub-prefecture and planning to remain for duration of study Willingness to allow stored laboratory specimens to be used for future research Acceptance and signature of the written informed consent and the assent for children aged 12-17 years who are not otherwise emancipated  HOUSEHOLD INCLUSION CRITERIA:  To be eligible for participation, households must meet the following criteria:  Household with at least 3 residents eligible for participation. Household with at least one compound member who is below 18 years of age whose parents or caretakers are willing to provide informed consent for the child to participate Household members willing to accommodate mosquito sampling in their compound, both indoors and outdoors.  SUBJECT EXCLUSION CRITERIA:  Behavioral, cognitive, or psychiatric disease that in the opinion of the investigator affects the ability of the subject to understand and cooperate with the study protocol. Other condition that, in the opinion of the investigator, would jeopardize the safety or rights of a volunteer participating in the trial or would render the subject unable to comply with the protocol.