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Vaccination is the administration of a vaccine to help the immune system develop immunity from a disease. Vaccines contain a microorganism or virus in a weakened, live or killed state, or proteins or toxins from the organism. In stimulating the body's adaptive immunity, they help prevent sickness from an infectious disease.
Vaccines may be monovalent (also called univalent) or multivalent (also called polyvalent). A monovalent vaccine is designed to immunize against a single antigen or single microorganism. [82] A multivalent or polyvalent vaccine is designed to immunize against two or more strains of the same microorganism, or against two or more microorganisms. [83]
An inactivated vaccine (or killed vaccine) is a type of vaccine that contains pathogens (such as virus or bacteria) that have been killed or rendered inactive, so they cannot replicate or cause disease. In contrast, live vaccines use pathogens that are still alive (but are almost always attenuated, that is, weakened).
Because Marburg virus and Ebola virus belong to the same family, Filoviridae, some scientists have attempted to create a single-injection vaccine for both viruses. This would both make the vaccine more practical and lower the cost for developing countries. [13] Using a single-injection vaccine has shown to not cause any adverse reactogenicity ...
Indeed, vaccines, including the influenza vaccine, Tdap, and pneumococcal vaccines, are less effective in adults over the age of 65. [ 28 ] [ 29 ] Nevertheless, the CDC recommends that elderly adults get the flu vaccine because influenza infection is particularly dangerous in this population and vaccine provides at least a moderate level of ...
Vets are looking into a mystery dog illness in 2023, which may be a virus. It's going around the U.S. and can be fatal. What to know about symptoms, prevention.
A disease caused by infection with an alien entity called "the colour" by characters in the story, the disease affects anything living, including plants, insects, livestock, wild animals, and humans. It causes various symptoms depending on species that ends with the victim crumbling into gray dust.
Hamm took a drug test that weekend, knowing he would fail. A week later, he delivered himself to his probation officer and soon after he was booked into the Campbell County jail. But before that, he had called Greenwell, Grateful Life’s intake supervisor. Hamm had begged to be allowed back into the program. Greenwell had turned him down.