Dengue outbreaks during the rainy season used to be a concern. However, there isn't a season anymore. Dengue fever can strike at any time of year.
According to entomologists, urbanization and climate change are two factors contributing to the rise in Aedes mosquito prevalence. And as a result, there will be more cases of dengue fever in the future.
They are discussing boosting vaccination rates and stopping the spread of dengue-carrying Aedes mosquitoes as solutions to this problem.
Experts, however, think that the question of whether a dengue vaccine is effective still needs to be answered. They claim that even if vaccines are developed, not everyone will benefit from them.
How Effective Is the Dengue Vaccine?
1. Provides around 80% protection
The latest dengue vaccine (Qdenga/Takeda) shows around 80% effectiveness
at preventing dengue infection and severe dengue for the first few years.
1.Strong protection against hospitalization
Studies show up to 90% protection against severe dengue that requires
hospitalization in many populations.
1.Works for people without prior
dengue
Unlike older vaccines (e.g., Dengvaxia), Qdenga can be given even if someone
never had dengue before, making it safer for mass vaccination.
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Why Bangladesh Is Not Using the Vaccine Yet
4.Not
approved by the Bangladesh government
Qdenga has not yet received regulatory approval from DGDA for use in
Bangladesh. Clearance is required before nationwide rollout.
5.Cost,supply, and policy challenges
- The vaccine is expensive, and mass vaccination
would require a large budget.
- Bangladesh needs local studies to test safety
and suitability for its population.
- WHO still recommends targeted use, not mass
vaccination, so Bangladesh prefers focusing on mosquito control and
public awareness.
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