Viral diseases: Introduction. A viral infection is any type of illness or disease caused by a virus, a type of microbe. Microbes are tiny organisms that cannot be seen without a microscope and include bacteria, fungi, and some parasites, as well as viruses.iral diseases: Introduction. A viral infection is any type of illness or disease caused by a virus, a type of microbe. Microbes are tiny organisms that cannot be seen without a microscope and include bacteria, fungi, and some parasites, as well as viruses.
OPTAR stands for Operating/Operational Target. Operating Targets. Operations, Planning, Training and Resource Support Services. Oceanside Photo & Telescope Astronomical Society (San Diego County, CA) Operational Tasking. Operational Tasking Data Link. Operational Tasking Nuclear. Occasional Papers in Translation and Textlinguistics.
OAR: Office of Oceanic and Atmospheric Research: OAR: Office of AIDS Research (National Institutes of Health) OAR: Offender Aid and Restoration: OAR: Office of Administrative Rules: OAR: Operating After Revocation (law enforcement) OAR: Office of Alumni Relations (various universities) OAR: Ontario Action Researcher (electronic journal) OAR