Human bocavirus, a newly discovered parvovirus of the respiratory tract.

Human Bocavirus is a newly discovered parvovirus. This virus is the fourth most frequently detected virus among symptomatic children with respiratory infection. Human Bocavirus is present worldwide and is a probable cause of symptomatic respiratory infection, although Koch's postulates are not all fulfilled. In this article, we propose an overview of the main clinical data about this virus, two years after its discovery. In addition, we discuss some hypotheses about its tropism for the lung in young children.