AstraZeneca's lung cancer drug Tagrisso has begun receiving benefits for first-line treatment. After 5 challenges, he passed the HIRA Cancer Disease Review Board. After adding the first treatment indication in December 2018, Tagrisso actively tried to expand benefits but was rejected by the review committee every time. The reason was that looking at the data of the phase 3 sub-analysis, the effect of improving overall survival in Asians could not be confirmed. The controversy over the efficacy of Tagrisso was started by Japan and ended by Japan. In the phase 3 FLAURA clinical trial, Japan had the greatest impact in making the OS values of Asians insignificantly different from those of the control group. The medical en