That nurse's reaction was indicative of the lack of awareness many people have about people living in developing countries. Malaria is transmitted by the bite of certain types of female mosquitoes that carry a parasite which causes the disease. The fact is, over 1 million people die every year from malaria, 90% of those deaths are children in Africa.
That is why Compassion International has developed the "Bite Back" program. This program provides bed nets that are treated with insecticides. This very effective program reduces the transmission of malaria by 90%. You can help support this program by visiting the link above, or by sponsoring a child in a developing country by clicking on this link: Compassion International