Union Health Minister JP Nadda said that Atal Bihari Vajpayee’s health continues to be critical. "Doctors are treating him. He is critical. And doctors are doing their best to restore his health,” he said. Vajpayee has been undergoing treatment at the All India Institute of Medical Sciences since June 11. He was admitted to the hospital with kidney tract infection, chest congestion, urinary tract infection and urine output on the lower side. The 93-year-old BJP leader, a diabetic, has one functional kidney.