tu youyou had a breakthrough. to the ancient texts and found the description in a medical handbook. it's hundreds of years old. it said take a handful of sweet wormwood, immerse it in water and then wring out the juice and drink it all, and this gave her the idea to try a cold method of extracting the medicinal properties from the plant. we conducted 190 experiments using this plant. and it was the 1915t that worked. we couldn't believe our eyes. everyone was so excited. all our hard work had finally paid off. next, we had to make sure it was safe for humans to take. tu youyou said, "i'm the leader of the team, "i should be the first to try this medicine," and i also volunteered. i said, "we should not expect other people to test whether it's dangerous," so we tested the drug over several days. and the result was we all felt fine. there were no bad side effects, except the pill itself didn't taste very nice. this 11—year—old boy has the disease. so he's given his first dose of artemisinin. the next morning, the ar