It seems nothing can keep Vidya Balan down. The actress, who had been laid low by dengue, is up on her feet again and has even resumed working. According to reports, even though the actress hasn't recovered fully, she has begun dubbing for her upcoming film 'Kahaani 2' Spurces close to the actress say that she did not want the film to be delayed because of her illness which is why she decided to resume dubbing despite not being fully fit.