How many times can a person get dengue fever?

A person can be infected with dengue fever 4 times in their lifetime, corresponding to 4 strains of Dengue virus.

The article was professionally consulted by Dr. Nguyen Minh Tien, Deputy Director of Children's Hospital (HCMC).

Dengue fever is an acute infectious disease caused by a virus that occurs year-round but is most common during the rainy season. Wet weather creates favorable conditions for mosquitoes to develop and transmit the disease.

Number of virus strains that cause dengue fever:

- The virus that causes dengue fever has 4 strains:

+ Dengue 1.

+ Dengue 2.

+ Dengue 3.

+ Dengue 4.

- Dengue virus strains:

+ Similar in ability to cause disease.

+ Different antigens.

How the body makes antibodies against the Dengue virus:

- When Dengue virus enters the human body, it will produce its own antigen.

- The immune system will recognize the antigens of this virus and produce corresponding antibodies to destroy and fight the virus, protecting the body.

How many times can a person get dengue fever in their lifetime?

Once a person is infected with one of the dengue virus strains, the body has lifelong immunity to that strain. However, it is still possible to be reinfected with dengue caused by another strain. Therefore, a person can be infected with dengue four times in a lifetime, corresponding to the four dengue virus strains.

In fact, most people only get dengue fever once, and some get it twice. It is very rare for people to get dengue fever a third or fourth time.

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