What Is a Virus?
A virus is a type of germ so small that it can only be seen with a microscope. Viruses were discovered in the late 1880s. Discover more in What Is a Virus?, part of the Understanding Viruses series.
GenresEnglish & College SuccessEnglishJuvenile Non-Fiction
English edition · First published 2020 by Lightbox · ISBN 9781791132569
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