<prompt> Regarding respiratory viruses all are true except ?RSV is the most common cause of bronchiolitis in infantsMumps causes septic meningitis in adultMeasles causes SSPEEBV causes pleuritis  <response>: Ans. is b i.e., Mumps causes septic meningitis in adult . There is no need to read any text book for this question, just read option b carefully. . Viruses cause aseptic meningitis not septic. . Septic meningitis is caused by bacteria. . Aseptic menigitis and orchitis are the most common complications of mumps in adult. About other options: . RSV is the most common cause of bronchiolitis. . SSPE is one of the neurological complication of measles. . Pneumonia with pleural effusion can be caused by EBV. 