<prompt> Late complication of diphtheria:Airway obstructionEncephalitisPneumoniaNeuropathy  <response>: Late Complications of diphtheria Cardiac Neurologic Myocarditis Congestive cardiac failure Arrhythmias Palatal paralysis - nasal quality in voice, difficulty in swallowing risk of aspiration 2 weeks Ocular palsy 3 weeks Symmetric polyneuropathy 10 days- 3 months 