Malaria

This mosquito-born illness is one of the longest-surviving threats to our livelihood, as records of the disease go back nearly 4,000 years – and cases are still being recorded today. This is especially true in areas like sub-Saharan Africa, where between 350 to 500 million cases of malaria are diagnosed each year, though only a small percentage of them lead to death today. The largest Malaria epidemics spread throughout many different countries in World War I and World War II, killing over 100,000 American soldiers alone.