Born and raised in India, English physician Ronald Ross joined the Indian Medical Service after completing medical school and undertook the study of malaria, then a disease that was not well understood. After years of research, he demonstrated the malarial parasite, Plasmodium, in the stomach of the Anopheles mosquito, identifying the disease’s mechanism of transmission. His discoveries earned him a Nobel Prize in 1902. When is World Mosquito Day, instituted by Ross, observed? Discuss
Source: The Free Dictionary