How about 300 million pieces of paper
Malaria is a serious worldwide epidemic, and more than 300 million people are infected with malaria every year in more than 0 countries around the world. Since the 1960s, original antimalarial drugs such as chloroquine have failed due to the resistance of plasmodium to them. The Vietnam War prompted the international search for new antimalarial drugs. In China (once operated by "523" ... 19 13)