PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY
Packaging for infectious material. Close-up of a biomedical researcher handling a specimen of an infectious substance classes as a 'biological substance category B'. This is a tissue specimen intended for testing in a suspected case of swine flu. This strain of the H1N1 influenza virus has caused various outbreaks, including the 2009 influenza pandemic. Photographed by the UK's Health Protection Agency.
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