Table 2. Types of Clinical Trial Reviews used and Approval Timelines For Candidate Vaccines against Ebola Virus Disease.

Candidate vaccine	Clinical trial phase	Target countries	Mode of review	Timeline	Trial status with references
GSK ChAd 3	Phase I	Mali, UK	Individual	2 weeks	Completed¹⁵
	Phase II	Ghana, Nigeria, Cameroun, Mali, Senegal	Joint	3 months	ongoing
	Phase III	Liberia			Could not be completed

Merck/Newlink r-VSV-ZEBOV	I	UK, Germany, Switzerland, Gabon, Kenya	Individual	2-3 weeks	Completed¹⁸


	III	Guinea	Assisted	2 weeks	Completed¹⁹
	III	Sierra Leone			Completed²⁰
J&J Ad26-ZEBOV/MVA	I	^*Ghana, Kenya, Uganda, Uganda, Tanzania	Joint	1-3 months
	II
	III	Sierra Leone			Could not be started

Application was withdrawn because product shelf-life expired before approval.