To analyze the impact of the SARS-CoV-2 pandemic on the circulation patterns of endemic respiratory viruses and their recovery dynamics, particularly focusing on the overlap with SARS-CoV-2.
Key Findings:
Winter viruses (influenza A, RSV) showed significant declines in positivity during the postemergence period, with delayed recovery, indicating a prolonged impact.
Spring viruses (parainfluenza 3, human metapneumovirus) and year-round viruses (rhinovirus/enterovirus, adenovirus) returned to prepandemic positivity quickly, suggesting resilience.
Altered seasonality was observed for winter viruses, with influenza A transitioning to a semiannual pattern before normalizing in 2024, highlighting shifts in circulation.
Median peak displacement for spring viruses normalized within 2 seasons postemergence, while winter viruses had more pronounced shifts, indicating varying recovery dynamics.
Interpretation:
The COVID-19 pandemic disproportionately affected endemic respiratory viruses with seasonal overlap with SARS-CoV-2, leading to significant disruptions in winter-dominant viruses and quicker recovery for spring and year-round viruses, underscoring the need for future pandemic preparedness.
Limitations:
The study is limited to data from a single geographic location (Cleveland, Ohio), which may not represent broader trends.
The analysis focuses on specific respiratory viruses and may not represent all endemic viruses, potentially overlooking other significant patterns.
Conclusion:
The findings highlight the need for understanding the dynamics of respiratory viruses in the context of future pandemics, emphasizing the prolonged impact on winter-dominant viruses and the importance of monitoring seasonal patterns.
