I did vaccination of my son 9yrs on date 23-mar. After that, fever started from 26-mar and since 3 members in family were already infected by typhoid, we thought of getting typhoid test done for my son on 29-mar. Result was negative. Continued fever medicine till 30-mar and discontinued since no fever after that. Again since 4-apr he got fever so this time we did widal test where values for O is 1:320 and H is 1:160 rest two values are 1:80. Please advise... We started typhoid medicine today..