An infectious microorganism known as a virus can only reproduce in the living cells of other animals.
They stand on the dividing line between the living and the dead.
The Mimivirus, a member of the Mimiviridae family, is the biggest virus currently understood.
It has an icosahedral form with a diameter of 0.75 m.
All of the tiny bacterial genes are present in its 1.2-Mbp genome.
Recently, it was discovered that Mimivirus is a brand-new human infection that causes pneumonia after samples from human bronchi-alveolar fluid were uncovered.