What do systematic reviews say?

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

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

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

Booster vs placebo/no booster

It is very uncertain whether booster changes all‐cause mortalityb compared with placebo/no booster (very low certainty).

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  RR 1.27 [0.52, 3.05]
  1 study · 28254 participants
  Very low

Booster vs placebo/no booster

Booster showed no clear difference in systemic reactogenicity eventsf compared with placebo/no booster (low certainty).

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  RR 1.8 [0.71, 4.56]
  1 study · 119 participants
  Low

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

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

Booster vs placebo/no booster

Booster probably leads to higher local reactogenicity eventsf compared with placebo/no booster (moderate certainty).

• Efficacy and safety of COVID‐19 vaccines 2022 · Cochrane Headline outcomes only
  RR 6.46 [3.18, 13.13]
  1 study · 119 participants
  Moderate

Standardised formal neonatal resuscitation training (SFNRT) programme with boosters vs SFNRT

It is very uncertain whether standardised formal neonatal resuscitation training (SFNRT)… changes knowledge retention ‐ hands on booster on NRP test scores compared with SFNRT (very low certainty).

• Standardised formal resuscitation training programmes for reducing mortality and morbidity in newborn infants 2015 · Cochrane Headline outcomes only
  MD 7
  1 study · 31 participants
  Very low

Standardised formal neonatal resuscitation training (SFNRT) programme with boosters vs SFNRT

It is very uncertain whether standardised formal neonatal resuscitation training (SFNRT)… changes knowledge retention ‐ video booster on NRP test scores compared with SFNRT (very low certainty).

• Standardised formal resuscitation training programmes for reducing mortality and morbidity in newborn infants 2015 · Cochrane Headline outcomes only
  MD 4
  1 study · 30 participants
  Very low

Standardised formal neonatal resuscitation training (SFNRT) programme with boosters vs SFNRT

It is very uncertain whether standardised formal neonatal resuscitation training (SFNRT)… changes knowledge retention ‐ any booster on NRP scores compared with SFNRT (very low certainty).

• Standardised formal resuscitation training programmes for reducing mortality and morbidity in newborn infants 2015 · Cochrane Headline outcomes only
  MD 5.5
  1 study · 44 participants
  Very low

Standardised formal neonatal resuscitation training (SFNRT) programme with boosters vs SFNRT

It is very uncertain whether standardised formal neonatal resuscitation training (SFNRT)… changes skills retention ‐ hands on booster on performance scores compared with SFNRT (very low certainty).

• Standardised formal resuscitation training programmes for reducing mortality and morbidity in newborn infants 2015 · Cochrane Headline outcomes only
  MD 5
  1 study · 31 participants
  Very low

Standardised formal neonatal resuscitation training (SFNRT) programme with boosters vs SFNRT

It is very uncertain whether standardised formal neonatal resuscitation training (SFNRT)… changes skills retention ‐ video booster on performance scores compared with SFNRT (very low certainty).

• Standardised formal resuscitation training programmes for reducing mortality and morbidity in newborn infants 2015 · Cochrane Headline outcomes only
  MD 6
  1 study · 30 participants
  Very low

Standardised formal neonatal resuscitation training (SFNRT) programme with boosters vs SFNRT

It is very uncertain whether standardised formal neonatal resuscitation training (SFNRT)… changes skills retention ‐ any booster on performance scores compared with SFNRT (very low certainty).

• Standardised formal resuscitation training programmes for reducing mortality and morbidity in newborn infants 2015 · Cochrane Headline outcomes only
  MD 5.48
  1 study · 44 participants
  Very low

WC‐rBS vaccine (Dukoral): two doses ± booster dose vs placebo

• Oral killed cholera vaccines for preventing cholera 2024 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 16423 participants
  High