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. 2025 Jan 24;21(1):e1012883. doi: 10.1371/journal.ppat.1012883

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© 2025 Marques et al

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Fig 2 — (A) RT-qPCR counts stratified by season (x-axis: spring, summer, fall, and winter). Blue indicates SARS-CoV-2 negative, red indicates SARS-CoV-2 positive by RT-qPCR. The y-axis represents the number of counts in each season. (B) Ct values of RT-qPCR positive samples stratified by season. (C) Prevalence in aggregate data from RPLN and nasal swabs binned by week. Blue indicates SARS-CoV-2 negative and red indicates SARS-CoV-2 positive by RT-qPCR. The y-axis represents the number of counts per week; x-axis indicates time. (D) Auto-regressive moving average logistic regression estimating SARS-CoV-2 positivity by RT-qPCR over time. Grey indicates the 95% credible interval. The y-axis represents the estimated percent positive of the sampled population; x-axis indicates time.