100.0 MB (18.3 MB compressed)
7883 x 4434 pixels
66.8 x 37.6 cm ⏐ 26.3 x 14.8 in (300dpi)
RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY RUSSELL KIGHTLEY / SCIENCE PHOTO LIBRARY
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Illustration of smallpox virus particles. The virus particles are covered in a viral membrane (transparent) derived from its host cell. Inside this lies the core, which contains the particle's DNA (deoxyribonucleic acid) genetic material. The core has a biconcave shape. The surface of the virus is covered with surface tubules which help the virus in attachment to a host cell. Smallpox is a disease that causes fever and often death. It was eradicated after a worldwide effort in the 1970s, but strains exist in research laboratories.
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