New research: introduction of vaccine passports increased vaccination rate in lagging countries
In countries with lower than average vaccination coverage, vaccination uptake has increased 20 days before and 40 days after the introduction of Covid-19 certification in these countries, according to a modeling study published in The Lancet Public Health.
Covid-19 certification, or ‘vaccine passports‘, require people to have full proof of vaccination, a negative test or Covid-19 recovery certificate, to access public places and events.
Using data from April to September 2021 in six countries where certification was legally required (Denmark, Israel, Italy, France, Germany, Switzerland), the study used modeling to estimate what the vaccine’s use would have been. without Covid-19 certification in each of the countries. six countries, based on vaccination trends from 19 otherwise similar control countries without Covid-19 certification.
In the main analysis, the authors estimated the number of additional doses per population attributable to the policy. As a secondary analysis, the authors examined the impact of the policy on reported infections.
In countries where vaccine coverage was previously low, the introduction of Covid-19 certification has been associated with a significant increase in the number of additional vaccine doses per million people -127,823 in France, 243,151 in Israel, 64 952 in Switzerland and 66,382 in Italy. In contrast, in Denmark and Germany, where average vaccination rates were higher before the introduction of certification, there was no significant increase in vaccination.
Compared to control countries, the daily number of Covid-19 cases decreased after implementation in France, Germany, Italy, Switzerland, but increased in Israel and Denmark. Many countries have implemented certification in response to the increase in cases, making it difficult to assess the effect of certification on reported infections.
Increases in immunization were greatest in people under 30 compared to older groups. The authors investigated whether prioritizing vaccine deployment among older age groups and eligibility of younger age groups at the time of certification may have influenced the results, but found that the effect may not have influenced the results. be fully explained by eligibility criteria based on age.
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