AMI IMAGES / NIAID / SCIENCE PHOTO LIBRARY AMI IMAGES / NIAID / SCIENCE PHOTO LIBRARY
H1N1 flu virus particles. Transmission electron micrograph (TEM) of a section through H1N1 influenza (flu) virus particles (virions). H1N1 is a subtype of the influenza A virus. Influenza A can infect multiple species and is the most virulent human pathogen of the three influenza types (A, B and C), meaning that it has the potential to cause a pandemic.
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