There are three main types of metadata: â¢ Descriptive metadata describes a resource for purposes such as discovery and identification.It can include elements such as title, abstract, author, and keywords. â¢ Structural metadata indicates how compound objects are put together, for example, how pages are ordered to form chapters.â¢ Administrative metadata provides information to help manage a resource, such as when and how it was created, file type and other technical information, and who can access it. Structural metadata indicates how compound objects are put together, for example, how pages are ordered to form chapters. â¢ Administrative metadata provides information to help manage a resource, such as when and how it was created, file type and other technical information, and who can access it.
Sabinâs live-virus, oral polio vaccine (administered in drops or on a sugar cube) soon replaced Salkâs killed-virus, injectable vaccine in many parts of the world.
Two types of flu vaccine exist-a shot and a nasal spray. Flu shots don't contain a live virus and cannot cause the flu. The nasal flu vaccine, called FluMist, contains weakened flu viruses, and does not cause flu. People with asthma should receive the flu shot vaccine, not FluMist.Other options include: 1  Intradermal shots use smaller needles that only go into the top layer of the skin instead of the muscle. 2  They are available for those ages 18 to 64.eople with asthma should receive the flu shot vaccine, not FluMist. Other options include: 1  Intradermal shots use smaller needles that only go into the top layer of the skin instead of the muscle.