World Mosquito Day is observed annually on 20 August to commemorate Sir Ronald Ross, a British doctor who demonstrated the link between mosquitoes and malaria transmission in 1897. This discovery helped revolutionize our collective understanding of malaria, triggering a shift towards more efficient prevention and treatment of the disease. World Mosquito Day helps raise awareness about the ongoing threat of malaria and other diseases transmitted by one of the world’s deadliest killers – the mosquito.