Historical Organization
Project 523
In animal tests, qinghao sample 191 inhibited malaria parasites in rodents with striking effectiveness.
The team drew on traditional medical texts while developing an ethyl-ether extraction method.
The 4 October finding was preclinical; later research was required before artemisinin could be used in patients.
Tu described this exact observation date in her Nobel biographical account, crediting the wider Project 523 effort.
