Table 2: Candidate vaccines under development using different platforms.

Platform

Candidate vaccines (no. and %)

PS.

Protein subunit

54

32%

VVnr

Viral Vector (non-replicating)

21

13%

DNA

DNA

16

10%

IV

Inactivated Virus

22

13%

RNA

RNA

41

24%

VVr

Viral Vector (replicating)

4

2%

VLP

Virus Like Particle

6

4%

VVr + APC

VVr + Antigen Presenting Cell

2

1%

LAV

Live Attenuated Virus

2

1%

VVnr + APC

VVnr + Antigen Presenting Cell

1

1%

BacAg-SpV

Bacterial antigen-spore expression vector

1

1%

Total

170

Ref: WHO COVID-19 vaccine tracker and landscape (accessed on August 5, 2022)