Parvovirus B19 is a childhood infectious disease of global proportions. It is the leading cause of erythema infectiousum, affecting mainly young age children. This new book outlines the recent advances in understanding Parvovirus infections in children particularly associated hematological consequences. Also, it describes the associated complications by in utero infection such as hydropes fetalis and acute leukaemia. It has emerged as an occupational viral infection both to health care workers and school workers. It carries the danger of serious infection of recipients of blood and blood products transfusion.