The United States of America eliminated malaria in 1951. The National Malaria Eradication Program was the idea of Dr. L. L. Williams. In 2003 there were 8 cases of malaria in Florida. These cases were endemically transmitted. (In this case "endemic transmission" means these infections happened entirely within the same area. Experts determined they didn't come from somewhere else. Endemic transmission is a serious failure of disease elimination.) In 2023 endemic transmission occurred in Florida and Texas. These infections were caused by "Plasmodium vivax". On August 18, 2023 there was an announcement. It was announced that malaria has returned to Maryland. This infection was caused by "Plasmodium falciparum". This announcement shows recognition that Maryland's malaria elimination failed in 2023. It required more than 40 years for this failure to occur. Genetically modified mosquitoes have been released to reeradicate malaria in small areas. Experts believe GM mosquitoes will be used to eradicate malaria from the United States of America.