you're probably fine. the oral typhoid vaccine like all vaccines works by generating an immune response by your body. the oral typhoid vaccine requires about a week (after the last dose) to be considered fully effective. because it sounds like you took the last dose only 12 hours later than scheduled you're probably fine as long as you avoid exposure to typhoid fever sources for at least a week. if you want a truly accurate answer however your best bet is to consult your primary health care provider or a pharmacist. they can tell you if you're considered vaccinated against typhoid fever or not. hope this helps!
i forgot to take my 4th typhoid vaccine pill on the scheduled day but took it the next day. do i need to start over? . all four pills were taken within 48 hours of each other even though the last one had 2 calendar days between doses. the first three i took around 6pm on the 5th 7th and 9th of the month. i took the last pill on the 12th of the month at 7am. do i need to start the sequence over or will the vaccine still be effective?