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Vaccinations

Vaccinations

Vaccines

Vaccines

Vaccines are among the most effective tools in preventive medicine, designed to prepare the immune system to recognize and combat infectious agents. By introducing antigens—substances that the immune system identifies as foreign—vaccines stimulate an adaptive immune response that leads to immunological memory. This immunological memory enables the body to mount a faster and more effective response upon future exposures to the actual pathogen.Vaccines can be categorized based on the type of...

Development of Immunocompetence

Development of Immunocompetence

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...

Smallpox

Smallpox

Smallpox is a severe contagious disease caused by the Variola major virus, a double-stranded DNA member of the Poxviridae family.Variola major transmission occurs primarily via inhalation of virus-laden droplets or direct contact with infectious scabs. The incubation period averages approximately seven days, although it may range from 7 to 17 days depending on the inoculum and host factors.Clinically, the prodromal phase is marked by an abrupt onset of high fever, malaise, headache, and myalgia.

Vaccine Production

Vaccine Production

Vaccine production involves a sequence of upstream and downstream processes to generate a safe and effective immunological product. It begins with cultivating microorganisms, such as viruses or bacteria, to obtain antigenic material. For viral vaccines, mammalian host cells are grown in bioreactors and subsequently infected with the target virus. The virus replicates within the host cells, which are lysed to release viral particles. This lysate is then clarified through filtration or...

Poliomyelitis

Poliomyelitis

Poliomyelitis is caused by poliovirus, a small, non-enveloped, positive-sense RNA virus of the Picornaviridae family and Enterovirus genus. Transmission occurs primarily via the fecal-oral route, often through ingestion of contaminated water or food. The virus initially replicates in the oropharynx and intestinal mucosa, particularly in lymphoid tissues such as the tonsils, Peyer’s patches, and regional lymph nodes. Primary viremia follows, allowing dissemination throughout the body.In most...

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Life Course Vaccination Continuum (LCVAC): An Expert Consensus on Life Course Vaccination in India.

Parvaiz A Koul¹, Agam Vora², Mangesh Tiwaskar³

¹Internal Medicine and Pulmonary Medicine, Sher-i-Kashmir Institute of Medical Sciences, Srinagar, IND.

|July 2, 2026

Summary

This summary is machine-generated.

India needs a life course approach to adult vaccination to combat vaccine-preventable diseases. The Life Course Vaccination Continuum framework addresses gaps and inequities in adult immunization programs.

Keywords:

immunisation policy indian vaccination programs life course vaccination preventive health strategies public health vaccine accessibility

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Area of Science:

Public Health
Immunology
Preventive Medicine

Background:

India's immunization efforts primarily target children, leaving adults susceptible to vaccine-preventable diseases (VPDs).
Routine vaccination services were further impacted by the COVID-19 pandemic, highlighting critical gaps in adult immunization coverage.
Implementing adult vaccination programs in low- and middle-income countries (LMICs) faces challenges like healthcare access inequities and limited awareness.

Purpose of the Study:

To develop expert consensus recommendations for a life course approach to adult vaccination in India.
To establish the Life Course Vaccination Continuum (LCVAC) framework for targeted adult immunization strategies.
To address barriers and propose solutions for effective adult vaccination program implementation.

Main Methods:

A 16-member expert panel from diverse medical specialties reviewed literature from 2014-2023.
A structured, evidence-based grading approach was used to formulate consensus recommendations.
The panel defined target adult groups and recommended specific vaccines based on age and risk factors.

Main Results:

The Life Course Vaccination Continuum (LCVAC) framework identifies three key adult target groups: adults with comorbidities (18-59), elderly (≥60), and healthy adults (18-60).
Recommended vaccines include Tdap, influenza, pneumococcal, zoster, hepatitis B, meningococcal, and hepatitis A, based on age and risk.
Identified barriers include vaccine hesitancy, cost, access limitations, and insufficient provider prioritization.

Conclusions:

The LCVAC provides the first comprehensive expert consensus for life course vaccination in India.
Successful implementation requires public awareness campaigns, healthcare professional education, and equitable access strategies.
Establishing dedicated adult vaccination centers is crucial for strengthening India's public health infrastructure.