Question

Immunisation with cholera vaccine remains effective for

• A. Life-long
• B. A year
• C. Six months
• D. One month

Answer 1

The correct option is C Six months

The traditional parenteral or oral cholera vaccine is safe and confers 85% protection for 4–6 months in all age groups. Annual boosters are required for the vaccine to remain effective.

So, the correct answer is option C.