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. We should note that the COVID-19 case data is of confirmed cases, which is a function of both supply (e.g., variation in testing capacities or reporting practices) and demand-side (e.g., variation in people’s decision on when to get tested) factors. The above findings of no discernable association between COVID-19 cases and levels of fully vaccinated was also observed when we considered a 1-month lag on the levels of fully vaccinated (Supplementary Figure 1, Supplementary Figure 2).
7 DAYS TO DIE LIBRARY FULL
Since full immunity from the vaccine is believed to take about 2 weeks after the second dose, we conducted sensitivity analyses by using a 1-month lag on the percentage population fully vaccinated for countries and US counties. Conversely, of the 57 counties that have been classified as “low” transmission counties by the CDC, 26.3% (15) have percentage of population fully vaccinated below 20%. Chattahoochee (Georgia), McKinley (New Mexico), and Arecibo (Puerto Rico) counties have above 90% of their population fully vaccinated with all three being classified as “High” transmission. Of the top 5 counties that have the highest percentage of population fully vaccinated (99.9–84.3%), the US Centers for Disease Control and Prevention (CDC) identifies 4 of them as “High” Transmission counties. Percentage of counties that experienced an increase of cases between two consecutive 7-day time periods by percentage of population fully vaccinated across 2947 counties as of September 2, 2021 We provide a dashboard of the metrics used in this analysis that is updated automatically as new data is made available by the White House COVID-19 Team ( ). For example, Los Angeles county in California had 18,171 cases in the last 7 days (August 26 to September 1) and 31,616 cases in the previous 7 days (August 19–25), so this county did not experience an increase of cases in our dataset. The percentage increase in COVID-19 cases was calculated based on the difference in cases from the last 7 days and the 7 days preceding them. We computed the number and percentages of counties that experienced an increase in COVID-19 cases by levels of the percentage of people fully vaccinated in each county. We excluded counties that did not report fully vaccinated population percentage data yielding 2947 counties for the analysis. For the 7 days preceding Septemwe computed the COVID-19 cases per 1 million people for each country as well as the percentage of population that is fully vaccinated.įor the county-level analysis in the US, we utilized the White House COVID-19 Team data, available as of Septem(Supplementary Table 2).
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We included 68 countries that met the following criteria: had second dose vaccine data available had COVID-19 case data available had population data available and the last update of data was within 3 days prior to or on September 3, 2021. We used COVID-19 data provided by the Our World in Data for cross-country analysis, available as of Septem(Supplementary Table 1).
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