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52.8 MB (3.2 MB compressed)
4572 x 4033 pixels
38.6 x 34.0 cm ⏐ 15.2 x 13.4 in (300dpi)
STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Coloured scanning electron micrograph (SEM) of human cells infected with the classic influenza A virus A/Puerto Rico/8/34 (H1N1). This strain of influenza virus is a descendent of the 1918 Spanish influenza virus, but is now highly laboratory adapted and is used as the basis for influenza virus vaccines because it replicates to very high titre in chicken eggs and in cell cultures. Magnification: x15,000 at 10cm. Specimen courtesy of the influenza research group, Professor Wendy Barclay Imperial College London.
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