The National Institutes of Health has just posted this new Funding Opportunity Announcement: PA-18-285: Addressing Health Disparities through Effective Interventions Among Immigrant Populations (R21 Clinical Trial Optional).
The goal of the Immigrant health initiative is to support exploratory and developmental research to design and test feasibility of effective interventions to reduce the health disparities among immigrant populations (particularly migrant workers, recent and 1st generation immigrants) and address issues that promote health equity.
The earliest submission date for this exploratory/development research grant is January 17, 2018.
You can find the full announcement here.