Every year National Dengue Day is celebrated on May 16 in India to spread awareness about the mosquito-borne disease. This observance is as an attempt to prevent the spread of the mosquito-borne infection. Dengue fever is caused by one of four types of dengue viruses spread by mosquitoes. There are many ways to keep them away from your home using natural products. As we mark National Dengue Day 2020, here are some natural mosquito repellents that you can keep in your house.