PRACTICE QUESTION

Q.  Consider the following statements:

1. Dengue fever virus (DENV) is a DNA virus of the family Flaviviridae; genus Flavivirus.

2. Once the virus enters the human body, it replicates in white blood cells called monocytes and macrophages, which are a part of the body's immune system.

3. Qdenga, is a live tetravalent attenuated Dengue vaccine for adults, adolescents and kids from four years of age.

4. Dengvaxia vaccine for Dengue is only recommended in individuals who have been previously infected, or in populations with a high rate of prior infection by age nine..

How many of the above statements are correct?

a) Only one

b) Only two

c) Only three

d) All of the above.

Answer: c

Explanation:

Statement 1 is incorrect: Dengue fever virus (DENV) is an RNA virus of the family Flaviviridae; genus Flavivirus.

Statement 2 is correct

Statement 3 is correct

Statement 4 is correct