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Influenza

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...

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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.

Inhibitors of Viral Protein Synthesis

Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...

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A drug interaction occurs when the concurrent use of another drug, food, or an external substance alters the pharmacological activity of a drug. This interaction can modify the action of the original drug, affecting its effectiveness and safety.Drug–food interactions are significant as they impact drug absorption, metabolism, and excretion. For example, grapefruit juice is a well-known disruptor of drug metabolism. It inhibits the cytochrome P450 3A4 enzyme, crucial for the metabolism of many...

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Related Experiment Video

Updated: Jun 19, 2026

A Luciferase-fluorescent Reporter Influenza Virus for Live Imaging and Quantification of Viral Infection

A Luciferase-fluorescent Reporter Influenza Virus for Live Imaging and Quantification of Viral Infection

Published on: August 14, 2019

Does viral interference affect spread of influenza?

A Linde¹, M Rotzén-Ostlund, B Zweygberg-Wirgart

¹Department of Epidemiology, Swedish Institute for Infectious Disease Control, Solna, Sweden. annika.linde@smi.se

Euro Surveillance : Bulletin Europeen Sur Les Maladies Transmissibles = European Communicable Disease Bulletin

|October 14, 2009

Summary

This summary is machine-generated.

Rhinovirus epidemics after school starts may hinder influenza spread during warmer months. This hypothesis suggests viral interactions could impact influenza epidemiology, warranting further research.

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Influenza Virus Propagation in Embryonated Chicken Eggs

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Published on: May 29, 2016

Area of Science:

Epidemiology
Virology
Public Health

Background:

Influenza spread typically decreases in warm, humid climates due to reduced aerosol transmission.
Rhinovirus is a common respiratory virus, often circulating during specific seasons.

Purpose of the Study:

To hypothesise that rhinovirus epidemics may interfere with influenza transmission.
To stimulate research into viral interactions affecting influenza epidemiology.

Main Methods:

This communication presents a hypothesis based on existing knowledge.
Limited laboratory data is included to support the proposed interaction.

Main Results:

The hypothesis suggests a potential inverse relationship between rhinovirus and influenza epidemics.
Seasonal patterns may be influenced by interactions between different respiratory viruses.

Conclusions:

Viral interference between rhinovirus and influenza is proposed as a factor in epidemiological patterns.
Further research is needed to validate the impact of viral interactions on respiratory virus spread.