A characteristic rash

A 15-year-old girl was admitted to the hospital with a four day history of fever (between 38 to 39oC) and sore throat. There was also recent history of flooding in her town area. On examination, she had bleeding gums, blanching maculopapular rash all over her trunk and petechiae on her arms and legs. Her full blood count on admission showed pancytopenia. Panel A shows a typical rash over her back and Panel B was taken after placing fingers over the rash for a few seconds. What is the diagnosis? Answer: refer to page 56