TAB vaccine is useful against
A) Polio
B) Pertussis
C) Diphtheria
D) Typhoid

Hint: Vaccine called as the biological preparation which provides the active acquired immunity against the diseases. When it is injected inside the body, it increases the production of antibodies which fight against antigen present in the body.

Complete Answer:
- TAB stands for typhoid, paratyphoid A, and paratyphoid B.
- Typhoid is one of bacterial diseases caused by rod-like bacteria, Salmonella typhi.
- This causative organism mostly exists in the intestine of humans.
- Typhoid comes under the communicable diseases and it’s transmitted through the food and water which is contaminated by waste of the patients. House flies transfer the bacteria from contaminated water or food to non-contaminated matter.
- Symptoms of the typhoid are high fever, headache, and weakness. Abdominal pain, constipation and inflammation.
- The typhoid vaccine provides immunity for 3 years from typhoid.

So, the correct answer is the TAB vaccine useful against Typhoid.

Additional information:
- Mary Mallon was the cook and infected so many people through the food she made. Her nickname was Typhoid Mary because she acts as carrier of bacteria of typhoid.
- The TAB vaccine given at age 6 years in starting afterwards at the age of 15 years (boost dose).
- This vaccine has some side effects so this is no recommendation for daily procedure.

Note: Incubation period 2 weeks. Causative organism enters by mouth and then reaches to the intestine.