The invention relates to the identification of a novel human polyomavirus species (designated IPPyV) and applications derived from the identified features and properties of this virus. The IPPy virus species of the invention qualifies as a human virus, in view of the fact that it is capable of infecting a human host. Having identified a novel human polyomavirus species, IPPyV, the inventors have been able to propose means for the detection of exposure or infection by such a virus, especially detection in a biological sample previously obtained from a human host. The invention also concerns means suitable for obtaining an immune response in a host with a view to prevent the onset or the development of an infection with an IPPyV.
