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  1. Dictionary
    Vac·cine
    /vakˈsēn/

    noun

    • 1. a substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute, treated to act as an antigen without inducing the disease: "every year the flu vaccine is modified to deal with new strains of the virus"
  2. 23 April 2024 | Q&A. What is vaccination? How does a vaccine work? When should I get vaccinated (or vaccinate my child)? Why should I get vaccinated? What diseases do vaccines prevent? Who can get vaccinated? What is in a vaccine? Are vaccines safe?

  3. Jul 21, 2020 · Vaccines are products that prepare the immune system to detect and eradicate certain disease-causing pathogens. Ultimately, vaccines help reduce the devastating impact of preventable diseases.

  4. 4 days ago · Vaccine, suspension of weakened or killed microorganisms or toxins or other biological preparation, such as those consisting of antibodies, lymphocytes, or mRNA, that is administered to prevent disease. Vaccines work by stimulating the immune system to attack specific harmful agents.

  5. en.wikipedia.org › wiki › VaccineVaccine - Wikipedia

    A vaccine is a biological preparation that provides active acquired immunity to a particular infectious or malignant disease. The safety and effectiveness of vaccines has been widely studied and verified.

  6. May 24, 2023 · Vaccines work by imitating an infectionthe presence of a disease-causing organism in the bodyto engage the bodys natural defenses. The active ingredient in all vaccines is an antigen, the name for any substance that causes the immune system to begin producing antibodies. In a vaccine, the antigen could be either.

  7. Dec 8, 2020 · How vaccines help. Vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body. Newer vaccines contain the blueprint for producing antigens rather than the antigen itself.

  8. Jan 21, 2022 · Yale Medicine offers an overview of vaccines, and what it means for the possibility of a COVID-19 vaccine.

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