Phase IV Clinical Study of sIPV Administration in Adolescent and Adult Populations — StellaPhase 4 — Post-approval study. The treatment has been approved, but researchers continue monitoring it in a large population over time.
Trial locations(3 sites)
China
Longxi County Center for Disease Prevention and Control, Dingxi City, Dingxi, Gansu Chengguan District Center for Disease Prevention and Control, Lanzhou City, Lanzhou, Gansu Zhangye Center for Disease Prevention and Control, Zhangye, Gansu Last updated January 2026