Dengue virus vaccines are vaccines used to prevent infection by dengue virus. The first dengue vaccine, Dengvaxia, was approved in December 2015. It is recommended for individuals aged 9–45 years living in areas with high risk of dengue transmission. Other dengue vaccines are in development, including a live attenuated virus vaccine, recombinant vaccine, and DNA vaccine. In October 2019, the World Health Organization recommended the use of Dengvaxia for individuals aged 9–45 years living in areas with high risk of dengue transmission. The vaccine is not recommended for individuals who have never been infected with dengue.
Dengue virus vaccines are a relatively new development in the fight against dengue fever. Here's a breakdown of the current situation:
Dengue Fever: Caused by four distinct but closely related viruses, dengue fever is a mosquito-borne illness prevalent in tropical and subtropical regions.
Vaccine Need: With millions of infections annually, a vaccine offering protection against all four dengue serotypes is a significant public health goal.
Current Situation:
- Limited Availability: Only one vaccine, Dengvaxia®, is currently licensed for use.
- Restrictions: Dengvaxia® has limitations. It's a tetravalent vaccine (protects against all four serotypes) but is only recommended for children aged 9-16 years with laboratory-confirmed previous dengue infection living in high-risk areas.
- Safety Concerns: Earlier use of Dengvaxia® raised concerns about increased hospitalization rates in some populations who received the vaccine without prior dengue infection. This is why the current recommendations are very specific.
Future Developments:
- Promising Candidates: Several other dengue vaccine candidates are undergoing clinical trials, showing promise for offering broader protection without the safety concerns of Dengvaxia®.
- Focus on Safety and Efficacy: These next-generation vaccines are being rigorously tested to ensure safety and effectiveness against all serotypes, regardless of prior dengue exposure.
Here are some additional points to consider:
- Dengue prevention also relies on mosquito control measures to reduce the spread of the virus.
- If you're traveling to a high-risk area, consulting a healthcare professional about potential preventative measures, including vaccination if you meet the criteria for Dengvaxia®, is crucial.