Disease Abbreviations and Acronyms
- ODOrphan Designation
- ODOrphan Drug
- ODAOrphan Dtug Act
- ODAOrphan Wrugs Act
- ODDTOpen Drug Discovery Teams
- ODSOverall Disability Scale
- OEPAOnchocerciasis Elimination Programme for The Americas
- OFIDOpen Forum Infectious Diseases
- OGMSOntology for General Medical Science
- OHFOmsk Hemorrhagic Fever
- OHFOxalosis & Hyperixaluria Foundation
- OHFVOmsk Hemorrhagic Fever Virus
- OHIOne Health Institute
- OHLOral Hairy Leukoplakia
- OHQOrthostatic Hypotension Questionnaire
- OHSOcular Histoplasmosis Syndrome
- OIDOffice of Infectious Diseases
- OIEOffice International Des Epizooties
- OIEOffice International Hpizooties
- OIEOffice International Des Epizootics
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