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Related Concept Videos

Influenza01:27

Influenza

Influenza is an acute, highly communicable viral disease that affects the respiratory tract and is responsible for seasonal epidemics worldwide. Influenza A is the most prevalent type associated with widespread outbreaks and is subtyped based on two surface glycoproteins: hemagglutinin (H) and neuraminidase (N), as in H1N1. These glycoproteins are essential for viral infectivity, transmission, and immune recognition. Transmission occurs primarily through respiratory droplets and contaminated...
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...

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Related Experiment Video

Updated: May 28, 2026

An Optimized Hemagglutination Inhibition (HI) Assay to Quantify Influenza-specific Antibody Titers
06:34

An Optimized Hemagglutination Inhibition (HI) Assay to Quantify Influenza-specific Antibody Titers

Published on: December 1, 2017

Algorithm-Optimized H5 Influenza mRNA Vaccine Induces Broad Immune Responses.

Liangliang Wang1,2,3, Zhengda Peng1,3, Chenchen He1,3

  • 1Division of HIV/AIDS and Sex-Transmitted Virus Vaccines, Institute for Biological Product Control, National Institutes for Food and Drug Control (NIFDC), Beijing 102629, China.

International Journal of Molecular Sciences
|May 27, 2026
PubMed
Summary
This summary is machine-generated.

A new H5 avian influenza vaccine, developed using algorithm optimization, shows promise for preventing pandemics. This broadly protective vaccine candidate induced strong immune responses against diverse H5 virus strains in animal studies.

Keywords:
H5 avian influenza virusalgorithm optimizationbroadly protective vaccinemRNA vaccinepandemic

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Last Updated: May 28, 2026

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Published on: May 6, 2015

Area of Science:

  • Virology
  • Immunology
  • Vaccine Development

Background:

  • H5 avian influenza viruses, particularly clade 2.3.4.4b, pose a pandemic threat due to high fatality rates and cross-species transmission.
  • Current vaccines offer limited protection against evolving H5 strains, necessitating broadly protective vaccine strategies.

Purpose of the Study:

  • To analyze human-infected H5 hemagglutinin (HA) sequences using bioinformatics.
  • To design and evaluate a novel, algorithm-optimized H5 influenza vaccine candidate for broad protection.

Main Methods:

  • Bioinformatic analysis of human-infected H5 hemagglutinin (HA) sequences.
  • Algorithm-based vaccine design optimizing for wild-type H5 HA trimer structure.
  • Assessment of vaccine efficacy in animal models, including antibody neutralization and cellular immune responses.

Main Results:

  • The algorithm-optimized H5 mRNA vaccine mimicked the wild-type H5 HA trimer structure.
  • Vaccine induced high neutralizing antibodies against multiple clade 2.3.4.4b H5 viruses.
  • Elicited cross-neutralizing antibodies against clade 2.3.4.4 and clade 2.2.1 H5 viruses, alongside robust cellular immunity.

Conclusions:

  • Algorithm-based approaches can effectively develop broadly protective vaccines against pandemic influenza viruses.
  • The developed H5 vaccine candidate demonstrates potential as a strategic stockpile for pandemic prevention.
  • Further development is warranted to address the threat of H5 avian influenza pandemics.