唔講credibility, 我唔熟Africa Health Research Institute
份野都寫得有文有路, 唔係content farm之流
Sample size係12個participants, 2 doses Pfizer
篇paper係話打完兩針加中covid效果會好過只打兩針
其他野唔評論, data有好過冇, 12個sample size睇下都冇壞
之前有睇過COVID vaccine有效率下降得好快, 6個月已經去到4hing水平, 可以補針
J&J仲衰, 兩個月就已經可以打booster