This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Influenza Nomenklatur HN.svg Nomenklatur der Influenzaviren am Beispiel der Vogelgrippe HN Illustration of influenza virus nomenclature system editable text InfluenzaNomenclatureDiagram svg Kopiersperre and others PDown Influenza
Page 2023 Free-images.com. All images are Public Domain