World Health Organization (WHO) - The directing and coordinating authority for health within the United Nations system, responsible for providing leadership on global health matters, shaping the health research agenda, setting norms and standards, articulating evidence-based policy options, providing technical support to countries and monitoring and assessing health trends.⏎
Yeast - A broad group of microscopic fungi that includes harmless forms of yeast used in baking and alcoholic fermentation as well as pathogenic species that can cause disease. ⏎
Vaccine - A biological preparation that improves the immune system’s ability to recognize and destroy harmful infectious agents.⏎
Vector - An organism (usually an arthropod such as a flea, mosquito, or tick) that carries an infectious agent from one host to another.⏎