COVID-19 vaccine effectiveness
(Randomized evidence)

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Trial Type Comparisons Design Participants Sample size Overall risk
of bias
Highest assessment
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Intervention 1 Intervention 2
ChiCTR2000032459
Sinopharm-Beijing
Xia S, Lancet Infect Dis, 2020 ()

Full text
Commentary
Inactivated virus

BBIBP-CorV 8mcg Day 0

BBIBP-CorV 4mcg D0/14

BBIBP-CorV 4mcg D0/21

BBIBP-CorV 4mcg D0/28

Adjuvant

RCT
Phase 2
Healthy SARS-CoV-2 serology negative adults 18-59 years old in a single centre in China N=448
Some concerns
Details

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