New Delhi: In 48-hours’ time, former PM of India, A B Vajpayee has shown improvement. His kidney functions are now normal & urine output is nearly normal. Dr Randeep Guleria, Director, AIIMS said 93-yr-old Vajpayee has undergone a slow dialysis, as he was admitted on June 11 with kidney tract infection & lower urine output apart from chest congestion.