USAID
The United States Agency for International Development is the lead U.S. government agency that works to end extreme global poverty and enable resilient, democratic societies to realize their potential.
Peace Corps
Peace Corps volunteers have served in Guinea since 1962, working in local communities on projects in agriculture, education and health.
https://www.peacecorps.gov/guinea/
CDC
The Centers for Disease Control and Prevention opened a country office in Conakry in 2015, to help develop and sustain capacities to prevent and rapidly detect and effectively respond to public health threats.
https://www.cdc.gov/globalhealth/countries/guinea/
NIH
The National Institutes of Health is an agency of the U.S. Department of Health. The office in Guinea supports capacity building in clinical research.