A study published Sept. 30, in the peer-reviewed European Journal of Epidemiology Vaccines found “no discernible relationship” between the percentage of population fully vaccinated and new COVID cases.
In fact, the study found the most fully vaccinated nations had the highest number of new COVIDcases, based on the researchers’ analysis of emerging data during a seven-day period in September.
The authors said the sole reliance on vaccination as a primary strategy to mitigate COVID-19 and its adverse consequences “needs to be re-examined,” especially considering the Delta (B.1.617.2) variant and the likelihood of future variants.
“Other pharmacological and non-pharmacological interventions may need to be put in place alongside increasing vaccination rates. Such course correction, especially with regards to the policy narrative, becomes paramount with emerging scientific evidence on real-world effectiveness of the vaccines.”
As part of the study, researchers investigated the relationship between the percentage of population fully vaccinated and new COVID cases across 68 countries and 2,947 U.S. counties that had second dose vaccine, and available COVID case data.
For seven days preceding Sept. 3, researchers computed COVID cases per one million people for each country, as well as the percentage of population that was fully vaccinated.