Characteristics of unpublished registered studies: replicating viral vector (10 studies)
Registration number	Registration date	Status	Design	Interventions	Estimated sample size	Phase
NCT04497298	4 August 2020	Completed	Parallel	TMV‐083/V‐591	90	Phase 1
ChiCTR2000037782	1 September 2020	Not recruiting	Parallel	DelNS1‐2019‐nCoV‐RBD‐OPT1	60	Phase 1
ChiCTR2100048316	5 July 2021	Not recruiting	Parallel	DelNS1‐2019‐nCoV‐RBD‐OPT1	400	Not reported
NCT04990466	4 August 2021	Not recruiting	Parallel	rVSV‐SARS‐CoV‐2‐S vaccine	550	Phase 2/Phase 3
ChiCTR2100051391	22 September 2021	Not recruiting	Parallel	DelNS1‐2019‐nCoV‐RBD‐OPT1	40,000	Phase 3
ChiCTR2000039715	6 November 2020	Ongoing	Parallel	DelNS1‐2019‐nCoV‐RBD‐OPT1	720	Phase 2
NCT04608305	29 October 2020	Ongoing	Sequential assignment	rVSV‐SARS‐CoV‐2‐S vaccine	1040	Phase 1/Phase 2
NCT04993209	6 August 2021	Ongoing	Adaptive	NDV‐HXP‐S	5394	Phase 1/Phase 2
NCT04498247	4 August 2020	Terminated	Sequential assignment	V591‐001	263	Phase 1/Phase 2
NCT04569786	30 September 2020	Terminated	Sequential assignment	V590‐001	232	Phase 1