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A vaccine is a biological preparation that provides active acquired immunity to a particular infectious or malignant disease. [1] [2] The safety and effectiveness of vaccines has been widely studied and verified.
This is an accepted version of this page This is the latest accepted revision, reviewed on 8 January 2025. Administration of a vaccine to protect against disease This article is about administration of a vaccine. For the vaccines themselves, see vaccine. See also: Immunization Medical intervention Vaccinations Girl about to be vaccinated in her upper arm ICD-9-CM 99.3 - 99.5 [edit on Wikidata ...
An mRNA vaccine is a type of vaccine that uses a copy of a molecule called messenger RNA (mRNA) to produce an immune response. [1] The vaccine delivers molecules of antigen-encoding mRNA into cells, which use the designed mRNA as a blueprint to build foreign protein that would normally be produced by a pathogen (such as a virus) or by a cancer ...
The new vaccines have been reformulated in hopes of providing optimal protection against the most commonly circulating coronavirus strains, a process that can be comparable to development of the ...
Influenza vaccines, colloquially known as flu shots [28] or the flu jab, [29] are vaccines that protect against infection by influenza viruses. [30] [31] New versions of the vaccines are developed twice a year, as the influenza virus rapidly changes. [30]
Vaccination has been one of the most impactful public health interventions of the past century. Since the foundation of the Expanded Programme on Immunization (EPI) by the World Health Organization (WHO) in 1974, vaccines have provided the single greatest contribution to improving health outcomes globally, particularly among children and infants.
This is a timeline of the development of prophylactic human vaccines. Early vaccines may be listed by the first year of development or testing, but later entries usually show the year the vaccine finished trials and became available on the market. Although vaccines exist for the diseases listed below, only smallpox has
Vaccine controversies have changed the way some private citizens view the marginal benefit of being immunized. If Individual A believes that there is a large health risk, possibly larger than the antigen itself, associated with immunization they will not be willing to pay for or receive immunization.