Since , your sister is having fever for 2 months , so also red spots . In typhoid fever usually there is low grade fever while patient also feel mild chills , headache , generalized body pain. But in my opinion , please get in an X ray chest and blood examination for ESR ( if more than 100 mm ) then a cause of concern. In my opinion consult an qualified physician and get his opinion after complete examination. Without physical examination it is very difficult to establish any diagnosis as there are so many possibilities present for fever.