<s>[INST] MY GRANDSON WAS DIAGNOSED WITH PARVO VIRUS. HE IS 14 YEARS OLD AND GOT SICK VERY SUDDENLY AND WAS URNNING VERY HIGH FEVER - 103 DEGREES. NOW HAS A RASH ON HIS STOMACH, HE STARTED THIS LAST SATURDAY NITE. MY CONCERN IS THE LAST TIME HE WE WERE TOLD HE HAD A VIRUS HE WAS 2 YEARS OLD AND HE HAD A VERY SEVERE CASE OF WEST NILE. [/INST] Hi.... Fever of few days without any localizing signs could as well a viral illness. Usually rather than fever, what is more important is the activity of the child, in between 2 fever episodes on the same day. If the kid is active and playing around when there is no fever, it is probably viral illness and it doesn't require antibiotics at all. Once viral fever comes it will there for 4-7 days. So do not worry about duration if the kid is active. But as you quote there is rash - It could be any viral erythematous illness - the possibilities are Hand Foot Mouth disease/ Chicken pox/ any other trivial viral exanthem. I suggest you use calamine lotion as its giving results along with oral antiallergic like HY Chat Doctor. Skin conditions are best diagnosed only after seeing directly. I suggest you to upload photographs of the same on this website, so that I can guide you scientifically.  Regards -  </s>