The effect of mandatory COVID-19 certificates on vaccine uptake: synthetic-control modelling of six countries.

ABSTRACT:

Background

Mandatory COVID-19 certification (showing vaccination, recent negative test, or proof of recovery) has been introduced in some countries. We aimed to investigate the effect of certification on vaccine uptake.

Methods

We designed a synthetic control model comparing six countries (Denmark, Israel, Italy, France, Germany, and Switzerland) that introduced certification (April-August, 2021), with 19 control countries. Using daily data on cases, deaths, vaccinations, and country-specific information, we produced a counterfactual trend estimating what might have happened in similar circumstances if certificates were not introduced. The main outcome was daily COVID-19 vaccine doses.

Findings

COVID-19 certification led to increased vaccinations 20 days before implem

SUBMITTER: Mills MC 

PROVIDER: S-EPMC8668192 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature