Question

BCG vaccine is given to prevent
A. Tuberculosis
B. Leprosy
C. Food poisoning
D. None of the above

Answer 1

Hint: The vaccine is a biological preparation that gives active acquired immunity against a specific infectious disease. Typically, a vaccine contains an agent which resembles a disease-causing microorganism. Vaccines are often made from weakened or killed forms of microbes, its toxins, or one of the surface proteins found in disease-causing microbes.

Complete answer:
Option A Tuberculosis: Caused by the bacteria Mycobacterium tuberculosis, Tuberculosis (TB) is a contagious infection that mostly affects the lungs. Bacille Calmette-Guérin or BCG is a vaccine that is being widely used for tuberculosis (TB) disease. This vaccine is prepared from the strain of attenuated live bovine tuberculosis bacillus, called Mycobacterium bovis. This strain does not have the ability to cause disease in humans.
Hence option A is the correct answer.
Option B Leprosy: The infection caused by bacterium Mycobacterium leprae is known as Leprosy. Skin, eyes, nose and peripheral nerves are mainly affected by this. Until today, there is no vaccine that is available to prevent leprosy. But to an extent, BCG vaccine, which is used against tuberculosis may provide some protection against leprosy. Since there is no recognized vaccine for leprosy.
So, option B is incorrect.
Option C Food poisoning: Food poisoning is caused by food contaminated with bacteria, viruses, parasites or toxins. There is no available vaccine for food poisoning.
Hence option C is also incorrect.
Option D None of the above: Here, already option A is found to be the correct answer.
Hence option D is incorrect.

Hence, Option A. Tuberculosis is the correct answer.

Note:
The BCG vaccine is also found to have some effectiveness against Buruli ulcer infection and other nontuberculous mycobacteria infections. In addition to this, it is sometimes used as part of bladder cancer treatment. Serious side effects for this vaccine are found to be rare. Redness, swelling, and mild pain at the site of injection are often found after taking the vaccine.