Review Article
COVID-19: An Overview of SARS-CoV-2 Variants—The Current Vaccines and Drug Development
Figure 4
Landscape of COVID-19 vaccine development. Vaccine candidates in the clinical trial (a), preclinical (b), and candidates in the clinical trial phase (c) based on the last update of the WHO report on March 30, 2023.
(a) |
(b) |
(c) |