@Zodiac
 

Concernant le fil twitter, la qualité est la même :

 

Le 18 février 2021 une 1ere étude mettant en évidence la diminution des cas en Israel permet de supposer que le vaccin prévient de manière significative la transmission

 

Vaccination with BNT162b2 reduces transmission of SARS-CoV-2 to household contacts in Israel

https://doi.org/10.1126/science.abl4292

 

We used a chain binomial model to estimate the effectiveness of vaccination with BNT162b2 [Pfizer-BioNTech messenger RNA (mRNA)-based vaccine] against household transmission

 

Effect of Covid-19 Vaccination on Transmission of Alpha and Delta Variants

DOI : 10.1056/NEJMoa2116597

The reductions in transmission of the delta variant declined over time after the second vaccination, reaching levels that were similar to those in unvaccinated persons by 12 weeks in index patients who had received ChAdOx1 nCoV-19 and attenuating substantially in those who had received BNT162b2.

 

Il y a évidemment pléthore d’autres études qui ont été publiées dans des grandes revues. Ci-dessous une liste non exhaustive :

Third doses of COVID-19 vaccines reduce infection and transmission of SARS-CoV-2 and could prevent future surges in some populations : a modeling study - PREPRINT

https://doi.org/10.1101/2021.10.25.21265500

 

Prevention of host-to-host transmission by SARS-CoV-2 vaccines

https://doi.org/10.1016/S1473-3099(21)00472-2

 

Here we discuss the available data on the existing, approved SARS-CoV-2 vaccines’ capacity to reduce transmissibility by reducing primary infection, viral replication, capacity for transmission, and symptomaticity. The potential for mucosal-targeted SARS-CoV-2 vaccine strategies to more effectively limit transmission than intramuscular vaccines is considered with regard to known immunological mechanisms.

 

Importance of COVID-19 vaccine efficacy in older age groups

https://doi.org/10.1016/j.vaccine.2021.03.020

We applied compartmental mathematical modelling to determine the relative effects of vaccines that block infection and onward transmission

 

Fractionation of COVID-19 vaccine doses could extend limited supplies and reduce mortality

https://rdcu.be/cYZbl

 ???

 

Analysis of the potential impact of durability, timing, and transmission blocking of COVID-19 vaccine on morbidity and mortality

https://doi.org/10.1016/j.eclinm.2021.100863

 ???