The main objective of this phase II trial is to evaluate the humoral immune response induced by the BBIBP-CorV vaccine in adults one month after complete vaccination regimen against SARS-CoV-2, comparing younger (up to 45 years old) and elderly (55+ years old) populations.~200 participants will be included. The age categories are 18 - 45 years, 55 - 64 years and 65+ years. The number of participants per age group will be distributed as follows 1:1:0,5. There will be no comparison between population on different vaccines.~Participants will receive two doses of BBIBP-CorV at 28 days interval. Vaccines will be administered intramuscular (0.5mL per injection)~Humoral vaccine immune responses, induced by BBIBP-CorV will be measured by ELISA at D0, M1, M2, M6, M12 and M24.
Phase II, non-randomized, open-label, comparative, single center national trial in Guinea, aimed to assess the humoral vaccine immune response induced by BBIBP-CorV vaccine in 200 adults aged between 18 and 45 years or 55 or older, one month after receiving the complete COVID-19 vaccination schedule.