Hi Doctor, I am an indian studying MS in USA. I visited India just for two weeks and i was very careful about my food intake like bottled water, good ambience restaurant food, etc., Before leaving to USA again, I just wanted to see if I was infeceted in any way and had a blood test. Everything seemed normal but the typhid diutions is 1:80. I do not have any kind of symptoms. Should I worry about this? I had this same exact thing an year back when I visited India. I took medicine for a week just for safety. No symptoms then too. Please suggest.