<prompt> Which of the following is the Least Common Chronic complication of measles?DiarrhoeaPneumoniaOtitis mediaSSPE  <response>: Ans. is d i.e., SSPERef: PSM Park, 19the, p. 128 Subacute sclerosing panencephalitis SSPE is a rare complication 1 in 300000 of measles, which develops many years after the initial infection. SSPE belongs to group C slow virus infection, caused by a defective Measles virus. 