Archive · 23 Jul 2026
Dengue Risk Remains After First Infection
Dengue is a virus that can make you very sick with fever, body aches, and sometimes more serious problems.
Many people think that if you get dengue once, you won't get it again.
But that's not true.
There are four types of dengue virus, and getting one type doesn't protect you from the others.
If you get dengue again with a different type, it can be more serious because your body's defense system might not work as well.
It's important to watch for warning signs like severe pain, bleeding, or trouble breathing.
Doctors say the most dangerous time is when the fever starts to go away.
To stay safe, use mosquito repellent, wear long clothes, and make sure there's no standing water where mosquitoes can breed.
If you think you might have dengue, see a doctor right away.
Dengue does not provide lifelong immunity; reinfection with a different serotype is possible.
A second infection can be more severe due to antibody-dependent enhancement (ADE).
The critical phase for severe complications is when the fever starts to subside.
Warning signs include persistent vomiting, severe abdominal pain, bleeding, and difficulty breathing.
Prevention measures include using mosquito repellents, wearing protective clothing, and preventing water stagnation.
- Who
- Individuals who have previously had dengue
- What
- Risk of reinfection with a different dengue serotype
- When
- During monsoon season and when exposed to mosquitoes
- Where
- India and other regions with multiple circulating serotypes
- Why
- Due to the lack of cross-immunity between different serotypes and the risk of antibody-dependent enhancement (ADE)
Dengue Immunity Misconception
Dengue Risk Awareness
Immunity After First Infection
Dengue Immunity Misconception
Some believe a first dengue infection provides lifelong immunity.
Dengue Risk Awareness
Recovery from dengue does not provide lifelong immunity; reinfection is possible.
Severity of Second Infection
Dengue Immunity Misconception
A second infection may not necessarily be more severe.
Dengue Risk Awareness
A second infection can be more severe due to antibody-dependent enhancement (ADE).
- Dengue Serotypes
- DENV-1, DENV-2, DENV-3, DENV-4
- Critical Phase
- Between the third and seventh day of illness
- Warning Signs
- Persistent vomiting, severe abdominal pain, bleeding, drowsiness, difficulty breathing
- Prevention Measures
- Mosquito repellents, protective clothing, preventing water stagnation
- Treatment Focus
- Complete clinical picture, not just platelet count