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Volume 30, Number 9—September 2024
Research Letter
SARS-CoV-2 Dynamics in the English Premier League Testing Program
Figure
![Infection dynamics in the English Premier League testing program for SARS-CoV-2, 2020–2022. A) Weekly PCR test positivity. Dots indicate infections; error bars indicate 95% CIs. Colored lines show inferred mean prevalence in the UK ONS Community Infection Survey. Gray shading shows period where the testing protocol was based on a rapid antigen test, with subsequent confirmatory PCR; hence, PCR positivity is not comparable because sampling was nonrandom. B) Distribution of individual Ct values over time since first positive test. Dashed circles indicate estimated reinfections: orange represents Alpha wave, in which 1 person was reinfected, as determined from 3 samples; purple represents Delta wave, in which samples indicate that 3 persons were reinfected. Ct, cycle threshold; ONS, Office for National Statistics.](/eid/images/24-0853-F1.jpg)
Figure. Infection dynamics in the English Premier League testing program for SARS-CoV-2, 2020–2022. A) Weekly PCR test positivity. Dots indicate infections; error bars indicate 95% CIs. Colored lines show inferred mean prevalence in the UK ONS Community Infection Survey. Gray shading shows period where the testing protocol was based on a rapid antigen test, with subsequent confirmatory PCR; hence, PCR positivity is not comparable because sampling was nonrandom. B) Distribution of individual Ct values over time since first positive test. Dashed circles indicate estimated reinfections: orange represents Alpha wave, in which 1 person was reinfected, as determined from 3 samples; purple represents Delta wave, in which samples indicate that 3 persons were reinfected. Ct, cycle threshold; ONS, Office for National Statistics.