Current perspectives on dengue episode in Malaysia

Area of Science:

• Virology
• Epidemiology
• Public Health

Background:

• Dengue virus poses a significant global health threat, with an estimated 390 million infections annually.
• Factors like urban expansion, ecological changes, and poor sanitation contribute to increased dengue epidemiology.
• The existence of four dengue serotypes complicates infection, as secondary infections can be more severe due to antibody-dependent enhancement (ADE).

Purpose of the Study:

• To highlight the escalating rates of dengue hospitalization and mortality.
• To emphasize the challenges in dengue management, particularly in Malaysia.
• To advocate for the development of a durable, cost-effective dengue vaccine effective against all serotypes.

Main Methods:

• Review of epidemiological data on dengue prevalence and impact.
• Analysis of factors contributing to disease transmission and severity.
• Evaluation of current dengue vaccine development challenges and considerations for local production.

Main Results:

• An estimated 390 million dengue infections occur annually worldwide.
• Secondary dengue infections can be exacerbated by antibody-dependent enhancement (ADE), leading to increased viremia and suppressed immune responses.
• Existing dengue vaccine candidates face challenges including serotype interference, incomplete protection, and dose adequacy concerns.

Conclusions:

• There is an urgent need for a universal dengue vaccine to combat the rising incidence and severity of the disease.
• Local vaccine production should be considered as a strategic approach to complement government efforts in dengue control.
• Addressing challenges in vaccine development is critical for effective dengue pandemic preparedness.