In this study, it is possible that a small amount of blood may be stored for future research, to help the researchers to learn more about malaria. There are no plans for the results from the various research laboratory tests to be made available to patients or to their private doctors. However, patients in this study may discuss the results of routine medical tests with the study investigators. Some of the blood collected will be tested for genetic conditions. Through genetic testing, researchers can learn more about how health or illness may be passed on to people by their parents, or from people to their children. All results of tests will remain confidential. Blood samples will be labeled by code, and reference to patients' identities will be protected.