<prompt> Which virus leads to Aplastic Crisis?PoxvirusParvo virus B19Hepatitis AHepatitis B  <response>: Hepatitis B, C and D can lead to aplastic anaemia. In contrast Parvo virus B19 leads to a transient bone marrow illness called aplastic crisis. Parvovirus B19 B19V is a single-stranded DNA virus of the family Parvo-viridae and genus Erythrovirus. It has a unique tropism for human erythroid progenitor cells. The virus requires the P blood antigen receptor also known as globoside to enter the cell. 