*An [[HIV]] [[virion]] is the width of 800 carbon atoms and contains about 100 million atoms total. An [[E. coli]] bacterium contains perhaps 100 billion atoms, and a typical human cell roughly 100 trillion atoms. | *An [[HIV]] [[virion]] is the width of 800 carbon atoms and contains about 100 million atoms total. An [[E. coli]] bacterium contains perhaps 100 billion atoms, and a typical human cell roughly 100 trillion atoms. |