<prompt> Parvovirus B-19 does not cause:Roseola infantumAplastic anemia in sickle cellFetal hydropsCollapsing FSGS  <response>: Ans. a Roseola infantum Roseola infantum or exanthem subitum is caused by HHV-6 and HHV-7 rarely. Disc caused by Parvo virus: Erythema infectiosum Seronegative ahritis Aplastic crisis in hemolytic anaemia Fetal infection leading to non-immunohydrops fetalis Chronic anaemia in immunocompromised Hemophagocytic syndrome Severe anaemia in malarial patients. 