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Related Concept Videos

Vaccinations01:51

Vaccinations

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Overview
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Development of Immunocompetence01:22

Development of Immunocompetence

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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...
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Active versus Passive Immunity01:31

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Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices.
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Active immunity refers to the resistance one develops...
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Immunological Memory01:23

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Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
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Cancer Vaccines01:30

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Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
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Dose-Response Relationship: Potency and Efficacy01:22

Dose-Response Relationship: Potency and Efficacy

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The potency of a drug is the measure of its ability to produce a biological response and can be compared by looking at the half-maximum effective concentration or EC50 values of different drugs. A lower EC50 value indicates higher potency of the drug. In the dose–response curve of two antihypertensive drugs, candesartan and irbesartan, a significant difference is observed in their EC50 values. A lower EC50 value for candesartan indicates that it is more potent than irbesartan, as it...
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Evaluation of Host-Pathogen Responses and Vaccine Efficacy in Mice
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Should you get a booster?

Graham Lawton

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    Summary
    This summary is machine-generated.

    Coronavirus vaccine booster campaigns are underway in the UK and US. This analysis reviews the evidence to help you decide whether to get an additional vaccine shot.

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    Area of Science:

    • Immunology
    • Public Health
    • Epidemiology

    Background:

    • The UK and US are initiating widespread coronavirus vaccine booster campaigns.
    • Public health strategies are evolving to address waning immunity and new variants.

    Purpose of the Study:

    • To evaluate the scientific evidence supporting the efficacy and necessity of coronavirus vaccine booster shots.
    • To inform public health recommendations regarding additional vaccination doses.

    Main Methods:

    • Review of current scientific literature on vaccine effectiveness and durability.
    • Analysis of data from clinical trials and real-world studies on booster efficacy.
    • Consideration of immunological responses post-booster vaccination.

    Main Results:

    • Evidence suggests booster shots can restore and enhance protection against coronavirus infection and severe disease.
    • Data indicates varying levels of waning immunity over time, making boosters a potential strategy.
    • The decision to boost may depend on individual risk factors and circulating viral strains.

    Conclusions:

    • Booster vaccinations represent a key component of ongoing coronavirus pandemic management strategies.
    • Further research is ongoing to optimize booster timing and target populations.
    • Public health authorities are weighing the benefits of widespread boosters against logistical and epidemiological factors.