India observes National Dengue Day on May 16 every year. Dengue is a viral infection caused by the dengue virus, which is transmitted to humans through the bites of infected mosquitoes, primarily the Aedes aegypti species. The symptoms of dengue typically appear within 4-7 days after being bitten by an infected mosquito. They can range from mild to severe and may include high fever, severe headache, joint and muscle pain, rash, nausea, vomiting, and mild bleeding. Severe forms of dengue are characterised by severe bleeding, organ damage, and a drop in platelet count. Preventing dengue involves controlling mosquito populations and reducing mosquito breeding sites. This includes measures such as using mosquito repellents, wearing protective clothing, keeping windows and doors screened, and eliminating stagnant water where mosquitoes can breed. If you suspect you have dengue or are experiencing symptoms, it is recommended to seek medical attention for a proper diagnosis and appropriate care.