question: Hi doctor, Before 20 days, I was typhoid positive. Then, I had Monocef 1 g injection once a day for seven days and then I had Zanocin 400 mg tablet once a day for seven days. Now, I am on Paraxin 500 three times a day and still I have some headache. My current Widal test report is as follows. Typhi O 1:160, Typhi H 1:80, Typhi AH 1:40 and Typhi BH 1:40. Please tell me when I should repeat my test to know whether I am typhoid positive or negative.