SAM OGDEN / SCIENCE PHOTO LIBRARY SAM OGDEN / SCIENCE PHOTO LIBRARY
Virus laboratory. Researcher, in protective clothing, seen through the door of a high security virus laboratory, in this case one that studies the HIV virus that causes AIDS. This security level 3 laboratory has signs on its door which warn that it contains biological and radio- logical hazards, and that access is restricted to authorised personnel only. Photographed at Harvard Medical School in Massachusetts, USA.
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