What do systematic reviews say?

Heterologous vaccination scheme vs homologous vaccination scheme

The review found no eligible studies for this question.

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Booster vs placebo/no booster

The review found no eligible studies for this question.

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

ChAdOx1 – AstraZeneca + University of Oxford vs placebo

The review found no eligible studies for this question.

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

SII‐ChAdOx1 – Serum Institute of India/AstraZeneca + University of Oxford vs ChAdOx1 – University of Oxford

The review found no eligible studies for this question.

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

WIBP‐CorV – Sinopharm‐Wuhan vs placebo

The review found no eligible studies for this question.

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

BBIBP‐CorV – Sinopharm‐Beijing vs placebo

The review found no eligible studies for this question.

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

NVX‐CoV2373 – Novavax vs placebo

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 25452 participants
  Moderate

FINLAY‐FR‐2 – Instituto Finlay de Vacunas vs placebo

The review found no eligible studies for this question.

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

mRNA‐1273 – ModernaTX vs placebo

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 28451 participants
  High

CVnCoV – CureVac AG vs placebo

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 25062 participants
  Very low

BNT162b2 – Pfizer/BioNTech + Fosun Pharma vs placebo

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 46077 participants
  High

AD26.COV2.S – Janssen Pharmaceutical Companies vs placebo

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 39058 participants
  High

Gam‐COVID‐VAC – Sputnik V vs placebo

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 19866 participants
  Moderate

CoronaVac – Sinovac vs placebo

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 19852 participants
  Low

BBV152 – Bharat Biotech vs placebo

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 16976 participants
  High