12
February
2022
|
16:01
Asia/Singapore
S’pore study finds mixing for Covid-19 booster jab more effective in fending off infection, severe disease
- TODAY, 12 February 2022
- 8world Online, 12 February 2022
- Lianhe Zaobao, 14 February 2022, p2
- Hao 96.3FM, 14 February 2022