Typhoid is not a virus. A virus grows within a cell in your body, to get out to infect others, it has to explode that cell. That causes inflammation as the immune system is alerted. That's your symptom. Can you spread it in the hour or so before enough cells explode to make you both infectious to others and symptomatic? Maybe, but the odds are small.

Typhoid bacteria live between the cells, get excreted, and with lack of handwashing by the cook (Typhoid Mary was a cook) the whole family gets typhoid, while Mary feels nothing. To Mary, it was just an asymptomatic parasite.