@CNN: See the heartwarming moment an 11-month-old girl giggles uncontrollably at the sound of her big sister’s voice after receiving a hearing aid. The baby’s hearing had become impaired after a medical treatment. https://t.co/F9pQqpKxPJ https://t.co/cF31HVhDFq

@CNN: See the heartwarming moment an 11-month-old girl giggles uncontrollably at the sound of her big sister’s voice after receiving a hearing aid. The baby’s hearing had become impaired after a medical treatment. https://t.co/F9pQqpKxPJ https://t.co/cF31HVhDFq