Influenza Virus (CDC)

Public Domain. For more information: Additional source description and credit info from source:


Suggested credit: CDC/ Dr. F. A. Murphy [via pingnews].

ID#: 8432


Description: This negative-stained transmission electron micrograph (TEM) depicts the ultrastructural details of a number of influenza virus particles, or “virions”. A member of the taxonomic family Orthomyxoviridae, the influenza virus is a single-stranded RNA organism

The flu is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. The best way to prevent this illness is by getting a flu vaccination each fall.


Every year in the United States, on average:


- 5% to 20% of the population gets the flu


- more than 200,000 people are hospitalized from flu complications, and


- about 36,000 people die from flu. Some people, such as older people, young children, and people with certain health conditions, are at high risk for serious flu complications.


Influenza A and B are the two types of influenza viruses that cause epidemic human disease. Influenza A viruses are further categorized into subtypes on the basis of two surface antigens: hemagglutinin and neuraminidase. Influenza B viruses are not categorized into subtypes. Since 1977, influenza A (H1N1) viruses, influenza A (H3N2) viruses, and influenza B viruses have been in global circulation. In 2001, influenza A (H1N2) viruses that probably emerged after genetic reassortment between human A (H3N2) and A (H1N1) viruses began circulating widely. Both influenza A and B viruses are further separated into groups on the basis of antigenic characteristics. New influenza virus variants result from frequent antigenic change (i.e., antigenic drift) resulting from point mutations that occur during viral replication. Influenza B viruses undergo antigenic drift less rapidly than influenza A viruses.


High Resolution: Right click here and select "Save Target As..." for hi-resolution image (19.14 MB)

Content Providers(s): CDC/ Dr. F. A. Murphy

Provider Email:

Creation Date: 1973

  • Luck 8y

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  • 8y

    well said
  • Elliott Buckler 7y

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  • BharatDiscovery 4y

    Dear flickr user,

    We thank you for uploading your image on Flickr under the license
    “Creative Commons” We are pleased to inform you that we have used your image on (Hindi). Bharatdiscovery is an educational and non-commercial project.
    We found this image useful for our website users and we used the image for a non-profit purpose. If you have any objection, kindly let us know.
    The image will be removed from Bharatdiscovery. Please feel free to contact us OR
    Please visit Page- विषाणु and Image- Influenza-Virus
  • Gab & Liz 4y

    nice EM
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