How did Professor Yang Ga die?

Professor Yang Ga died of illness. Yang Ga, a professor at Tibet Tibetan Medical University, a doctoral supervisor, a doctor at Harvard University, a visiting professor at Southwest University for Nationalities and a visiting researcher at Tibet Tibetan Hospital, is proficient in five languages: Tibetan, Chinese, English, Vatican and French. Main social part-time jobs: Deputy Director of Xizang Autonomous Region Ancient Books Protection Expert Committee, member of Xizang Autonomous Region Tibetan Medicine Standardization Technical Committee, visiting professor of Southwest University for Nationalities, visiting researcher of Tibet Tibetan Hospital, tutor of Tibetan medicine creation space, etc.