Clinical improvement: participants discharged from hospital ‐ not reported · individuals with moderate to severe disease
Summary of findings table ‐ Convalescent plasma showed no clear difference in clinical improvement: participants discharged from hospital compared with placebo or standard care alone (high certainty).
1 finding from 1 review
Quality of life, · individuals with moderate to severe disease
1 finding from 1 review
Grades 3 and 4 adverse events · individuals with moderate to severe disease
Summary of findings table ‐ Convalescent plasma showed no clear difference in grades 3 and 4 adverse events compared with placebo or standard care alone (low certainty).
1 finding from 1 review
Serious adverse events ‐ total · individuals with moderate to severe disease
Summary of findings table ‐ Convalescent plasma showed no clear difference in serious adverse events ‐ total compared with placebo or standard care alone (moderate certainty).
1 finding from 1 review
All‐cause mortality at up to day 28 · individuals with moderate to severe disease
It is very uncertain whether summary of findings table ‐ Convalescent plasma changes all‐cause mortality at up to day 28 compared with standard plasma (very low certainty).
1 finding from 1 review
Clinical worsening: need for invasive mechanical ventilation, or death at up to day 28 · individuals with moderate to severe disease
It is very uncertain whether summary of findings table ‐ Convalescent plasma changes clinical worsening: need for invasive mechanical ventilation, or… compared with standard plasma (very low certainty).
1 finding from 1 review
Clinical improvement: participants discharged from hospital ‐ not reported · individuals with moderate to severe disease
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
All‐cause mortality at day 28 · individuals with moderate or severe COVID‐19
Hyperimmune immunoglobulin from human plasma showed no clear difference in all‐cause mortality at day 28 compared with saline placebo (low certainty).
1 finding from 1 review
RR 0.79 [0.43, 1.44]
Studies not reported
Low
Clinical improvement: participants discharged from hospital ‐ not reported · individuals with moderate or severe COVID‐19
RBD‐specific polyclonal F(ab') 2 fragments of equine antibodies… showed no clear difference in improvement of clinical status (number of participants discharged… compared with saline placebo (low certainty).
1 finding from 1 review
Quality of life · individuals with moderate or severe COVID‐19
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Adverse events: all grades · individuals with moderate or severe COVID‐19
RBD‐specific polyclonal F(ab') 2 fragments of equine antibodies… showed no clear difference in adverse events of any grade (by day 28) compared with saline placebo (low certainty).
1 finding from 1 review
Grades 3 and 4 adverse events · individuals with moderate or severe COVID‐19
RBD‐specific polyclonal F(ab') 2 fragments of equine antibodies… led to higher adverse events at grade 3 or 4 (by day 28) compared with saline placebo; GRADE not reported.
1 finding from 1 review
OR 4
3 participants
GRADE not reported
Serious adverse events (by day 28) · individuals with moderate or severe COVID‐19
RBD‐specific polyclonal F(ab') 2 fragments of equine antibodies… showed no clear difference in serious adverse events (by day 28) compared with saline placebo (low certainty).
1 finding from 1 review
Worsening of clinical status at day 28 (data only available for clinical status worsened on day 7) · individuals with moderate or severe COVID‐19
It is very uncertain whether hyperimmune immunoglobulin from human plasma changes worsening of clinical status at day 28 (data only available for… compared with saline placebo (very low certainty).
1 finding from 1 review
RR 0.85 [0.58, 1.23]
Studies not reported
Very low
Improvement of clinical status · individuals with moderate or severe COVID‐19
Hyperimmune immunoglobulin from human plasma showed no clear difference in improvement of clinical status (number of people discharged from… compared with saline placebo (moderate certainty).
1 finding from 1 review
RR 1.02 [0.97, 1.08]
Studies not reported
Moderate
Quality of life · individuals with moderate or severe COVID‐19
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Adverse events: all grades · individuals with moderate or severe COVID‐19
Hyperimmune immunoglobulin from human plasma showed no clear difference in adverse events of any grade up to 28 days (data only available for… compared with saline placebo (low certainty).
1 finding from 1 review
RR 0.98 [0.81, 1.18]
Studies not reported
Low
Grades 3 and 4 adverse events · individuals with moderate or severe COVID‐19
Hyperimmune immunoglobulin from human plasma probably leads to higher adverse events at grades 3 to 4 up to 28 days compared with saline placebo (moderate certainty).
1 finding from 1 review
RR 4.09 [1.39, 12.01]
Studies not reported
Moderate
Serious adverse events up to day 28 (data available only as a composite of serious adverse events or death up to day 28) · individuals with moderate or severe COVID‐19
Hyperimmune immunoglobulin from human plasma showed no clear difference in serious adverse events up to day 28 (data available only as a… compared with saline placebo (low certainty).
1 finding from 1 review
RR 0.72 [0.45, 1.14]
Studies not reported
Low
All‐cause mortality (by day 28) · individuals with moderate or severe COVID‐19
RBD‐specific polyclonal F(ab') 2 fragments of equine antibodies… showed no clear difference in all‐cause mortality (by day 28) compared with saline placebo (low certainty).
1 finding from 1 review