Filaria refers to a group of parasitic worms belonging to the family Filariidae. These worms are primarily transmitted to humans through the bites of infected mosquitoes or other arthropods. The most common types of filarial infections include lymphatic filariasis, which can lead to severe swelling and disability, and onchocerciasis, also known as river blindness, which can cause vision loss. Filarial infections are prevalent in tropical and subtropical regions, affecting millions of people worldwide. Prevention focuses on controlling mosquito populations and using medications to treat and manage infections. Early diagnosis and treatment are essential to reduce complications and improve quality of life for affected individuals.