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Vaccinations

Vaccinations

Active versus Passive Immunity

Active versus Passive Immunity

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.
Active Immunity
Active immunity refers to the resistance one develops...

Immunological Memory

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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.
What is Immunological Memory?
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Cancer Vaccines

Cancer Vaccines

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...

Cross-reactivity

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Microorganisms in Medicine and Therapeutics

Microorganisms in Medicine and Therapeutics

Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.

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Protección del rebaño mediante la vacunación

Natalie E Dean¹, M Elizabeth Halloran^2,3

¹Department of Biostatistics and Bioinformatics, Emory University, Atlanta, GA, USA.

Science (New York, N.Y.)

|March 10, 2022

Resumen

Las vacunas contra la COVID-19 reducen significativamente la transmisión del virus, pero la reducción exacta es dinámica. Las investigaciones en curso rastrean la efectividad de la vacuna contra el SARS-CoV-2 a lo largo del tiempo.

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Área de la Ciencia:

Epidemiología
Vacunas y vacunas
Salud pública

Sus antecedentes:

El surgimiento de las variantes del SARS-CoV-2 ha planteado preguntas sobre la protección inducida por la vacuna contra la transmisión.
Comprender el impacto de la vacunación en la propagación viral es crucial para las estrategias efectivas de salud pública.

Objetivo del estudio:

Evaluar hasta qué punto las vacunas contra la COVID-19 disminuyen la transmisión del SARS-CoV-2.
Analizar la naturaleza dinámica de la eficacia de la vacuna en la reducción de la propagación viral.

Principales métodos:

Revisión sistemática de ensayos clínicos y estudios observacionales en el mundo real.
Metaanálisis de los datos de reducción de la transmisión en diferentes tipos y variantes de vacunas.
Análisis longitudinal de la eficacia de la vacuna en el tiempo.

Principales resultados:

La vacunación demuestra que reduce el riesgo de transmisión del SARS-CoV-2.
El grado de reducción de la transmisión varía según la vacuna, la variante circulante y el tiempo transcurrido desde la vacunación.
Las dosis de refuerzo parecen restaurar y mejorar la protección contra la transmisión.

Conclusiones:

Las vacunas contra la COVID-19 son herramientas efectivas para mitigar la transmisión viral.
Es necesario un seguimiento continuo y estrategias de vacunación actualizadas para abordar la evolución de la dinámica viral y mantener la inmunidad de la población.