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Since you have fever
with headache for a week and S typhi O-is 1/160 that means you have typhoid
.Please consult a doctor with the report and he will give you antibiotic for typhoid which you will have to take in for the advised period and you should recover from typhoid.Also examination by a doctor will help to rule out whether it is only typhoid or a mixed infection of typhoid with malaria
or viral.So please consult doctor
and get treated.