Related Experiment Video
Updated: Jun 23, 2026

06:56
Influenza Virus Propagation in Embryonated Chicken Eggs
Published on: March 19, 2015
Resurrected pandemic influenza viruses
Terrence M Tumpey1, Jessica A Belser
1Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA. tft9@cdc.gov
Annual Review of Microbiology
|April 24, 2009
Summary
Understanding the 1918 pandemic influenza virus is crucial for public health. Reconstructing and studying this virus reveals key factors in its high virulence and transmissibility, aiding future pandemic preparedness.
Area of Science:
- Virology
- Epidemiology
- Public Health
Background:
- Influenza viruses represent a significant global health challenge.
- Pandemic influenza strains, like the 1918 virus, exhibit exceptional virulence and transmissibility.
- Understanding these factors is vital for developing effective prevention and control strategies.
Purpose of the Study:
- To review current research on the 1918 pandemic influenza virus.
- To elucidate the molecular determinants contributing to the 1918 virus's pathogenicity and spread.
- To inform strategies for future influenza pandemic preparedness and response.
Main Methods:
- Reconstruction of the 1918 influenza virus.
- Analysis of recombinant viruses with exchanged genes between 1918 and contemporary strains.
- Investigation of molecular factors influencing viral virulence and transmission.
Main Results:
- Studies have provided new insights into the exceptional virulence and transmissibility of the 1918 pandemic strain.
- Recombinant virus analysis is a primary approach to dissecting viral pathogenicity.
- Specific genes contributing to high virulence are being identified.
Conclusions:
- Identifying the genetic determinants of the 1918 virus's virulence is essential for understanding highly pathogenic influenza strains.
- This knowledge will enhance global preparedness and response to future influenza pandemics.
- Continued research is critical for mitigating the impact of influenza pandemics.
Related Concept Videos
Viral Recombination
Cells are sometimes infected by more than one virus at once. When two viruses disassemble to expose their genomes for replication in the same cell, similar regions of their genomes can pair together and exchange sequences in a process called recombination. Alternatively, viruses with segmented genomes can swap segments in a process called reassortment.
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...
Viral Mutations
A mutation is a change in the sequence of bases of DNA or RNA in a genome. Some mutations occur during replication of the genome due to errors made by the polymerase enzymes that replicate DNA or RNA. Unlike DNA polymerase, RNA polymerase is prone to errors because it is not capable of “proofreading” its work. Viruses with RNA-based genomes, like HIV, therefore accrue mutations faster than viruses with DNA-based genomes. Because mutation and recombination provide the raw material for adaptive...
Vaccinations
Overview

