<prompt> Infant has fever, one episode of febrile convulsions admitted for observation, fever than subsided and followed by rash on abdomen chest, maculopapular erythematous-what is the cause?ChickenpoxMeaslesTyphoidDengue  <response>: Ans. is a i.e., Chickenpox In this question, infant had develop rash on first day offever distribution of rash is in our of chickenpox, or varicella. Mnemonic for Day of appearance of rash in a febrile patient is Very Sick Person Must Take Double Tablets Very - Varicella day 1 Sick - Scarlet fever day 2 Person - Pox-small pox day 3 Must - Measles day 4 Take - Typhus day 5 Double - Dengue day 6 Tablets - Typhoid day 7 Chicken pox Varicella : Caused by virus Child develop fever with rash Rash are macular, maculo-papular, vesicular pleomorphic Distribution is usually centripetal Complication include - more seen in immunocompromised child. Mild thrombocytopenia Hematurea GI Bledding Encephalitis Pneumonia 