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Peak Nasal SARS-CoV-2 and Influenza Viral Loads Relative to Symptom Onset, 2022-2025: Impact of Vaccination and Implications for Multiplexed Testing

2025-12-30 infectious diseases Title + abstract only
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BackgroundWe previously reported that nasal SARS-CoV-2 viral loads (VL) peaked around the fourth day of symptoms in highly immune adults sampled April 2022 - April 2023, while influenza A VL peaked soon after symptom onset. We hypothesized that SARS-CoV-2 kinetics may have changed due to reduced COVID-19 incidence and altered vaccination patterns. Understanding how viral kinetics evolve over time is essential to inform testing strategies. MethodsParticipants with symptomatic upper respiratory i...

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