||||||||||WIBP Inactivated COVID-19 vaccine (Omicron) / Sinopharm Enrollment closed, Trial completion date, Trial primary completion date: Sequential Immunization of Two Doses of Inactivated COVID-19 Vaccine (Omicron) in Vaccinated Population Aged 18 Years and Above (clinicaltrials.gov) - Jun 18, 2023 P3, N=1804, Active, not recruiting, Sponsor: China National Biotec Group Company Limited Recruiting --> Active, not recruiting | Trial completion date: Nov 2023 --> Mar 2024 | Trial primary completion date: Nov 2022 --> Jul 2023