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Vaccinations01:51

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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.
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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...
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Related Experiment Video

Updated: Aug 31, 2025

Expression and Purification of Virus-like Particles for Vaccination
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Avian flu: is vaccination the answer?

Josh Loeb

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    |August 19, 2022
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    Summary
    This summary is machine-generated.

    Highly pathogenic avian influenza outbreaks in the Northern Hemisphere necessitate a strategic shift in Europe's disease management. Experts call for a significant change in how Europe addresses avian flu.

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    Area of Science:

    • Veterinary Medicine
    • Epidemiology

    Background:

    • The Northern Hemisphere has experienced unprecedented outbreaks of highly pathogenic avian influenza (HPAI) over recent months.
    • These outbreaks have significantly impacted poultry populations and raised concerns for wild bird health.

    Discussion:

    • Current strategies for managing avian influenza in Europe may be insufficient given the scale and frequency of recent outbreaks.
    • A critical review of existing control measures and surveillance protocols is warranted.

    Key Insights:

    • Experts are advocating for a fundamental reevaluation of Europe's approach to combating avian influenza.
    • A "step change" in strategy is proposed to enhance disease control and prevention.

    Outlook:

    • Implementing new, robust strategies is crucial to mitigate future HPAI outbreaks in Europe.
    • Continued collaboration and adaptive management will be key to safeguarding animal and public health.