Actres Vidya Balan, who recently came back to Mumbai after shooting for "Kahaani 2", is down with dengue.A source close to the actress revealed that she was diagnosed with the disease on Thursday and has been advised bed rest for the next 10-15 days by her doctor.The actress had just returned from US schedule of "Kahaani 2", her forthcoming film along with "Begum Jaan".
