SCI-VIS IFC-CNR / SCIENCE PHOTO LIBRARY SCI-VIS IFC-CNR / SCIENCE PHOTO LIBRARY
HIV (human immunodeficiency virus) particle, the gp120 surface proteins by which the infection is initiated can be seen (grey). HIV is the virus which causes AIDS (acquired immunodeficiency syndrome). It is transmitted via bodily fluids including semen, vaginal fluids and blood of an infected person.
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