Vaccine Table Update: Lots on Delta
Vaccine Table Update: Lots on Delta
You know the drill. Additions since last iteration are in peach. Data sources (and explanations) are below.
Pfizer
A Lancet study (blood from 250 people) found Delta reduced neutralization antibodies by 5.8-fold
A study in the UK (1,054 people with Delta) found 87.9% efficacy 2 weeks after the second dose. Efficacy after one dose was 33.2%.
An analysis (14,019 people with Delta) found 94% efficacy against severe disease (i.e. admission to hospital) after one dose and 96% efficacy after two doses.
In a Scottish study (7,723 people with Delta) 134 people were hospitalized. Vaccine had 79% efficacy.
If you missed it, here is the myocarditis update
Moderna
Delta: No updates since the last iteration, but just because everyone always asks… I have no reason to believe that Moderna would be different than Pfizer
If you missed it, here is the myocarditis update
AstraZeneca (AZ)
A study in the UK (1,054 people with Delta) found 59.8% efficacy 2 weeks after the second dose. Efficacy after one dose was 32.9%.
An analysis (14,019 people with Delta) found 71% efficacy against severe disease (i.e. admission to hospital) after one dose and 92% efficacy after two doses.
A Scottish Lancet study (7,723 people with Delta) found 60% efficacy
Booster trial for Beta variant vaccine has started (here)
Johnson & Johnson (J&J)
Working well against Beta and Gamma (both in terms of antibody and T-cell response; here)
J&J said it’s testing whether its vaccine works against Delta, but no data is available yet (I’m keeping my eye out). There are a lot of opinions circulating regarding whether J&J people need a second dose. I want to be clear that there has been no scientific evidence showing the need, safety, or effectiveness yet.
Novavax
If you missed the update from Phase III trials, go here
Mixing vaccines
Natural Infection
Preliminary evidence is showing that natural immunity not working against Delta. But our confidence is low; we need more studies (here)
Love, YLE