She was undergoing treatment at the Sri Ganga Ram Hospital since June 15 due to a stomach ailment. Currently, Sonia's health is stable and a special diet has been prescribed, said the hospital's chairman Dr. Ajay Swarup. Sonia Gandhi was admitted to the gastroenterology department on Sunday. She was given medicines to control the infection. Meanwhile, in February this year, 78-year-old Sonia Gandhi was admitted to the hospital due to a stomach ailment.