It is as yet uncertain how the Gulf of Mexico oil spill will affect the health of clean-up workers and volunteers, residents, and visitors in the Gulf. The IOM recommends that the U.S. Department of Health and Human Services focus on researching psychological and behavioral health, exposure information to oil and dispersants, seafood safety, communication methods for health studies, and methods for conducting research in order to better understand and mitigate the effects on human health for this oil spill and for future disasters.