question: 6 months old male infant, presenting with cough of a week duration. cough worse at night but does not disturb sleep. Nil any other symptoms or sign. Immunization up to date aside from receiving BCG a bit late (6 weeks of age) following which he developed an abscess at the injection site which resolved spontaneously without treatment. healthy with a left arm BCG scar. all systems essentially normal. What advise would you give the parents