"We are subjecting her to all examinations and procedures. She continues to be critical," Dr B D Athani, Medical Superintendent of Safdurjung Hospital, told PTI.
Doctors had said yesterday that the rape victim is psychologically "composed and optimistic" about her future and has started communicating.
Doctors had also said they are keeping the patient on high doses of antibiotics and high standards of hygiene -- two important factors for preventing infection.