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Area of Science:

  • Epidemiology
  • Virology
  • Public Health

Background:

  • The emergence of SARS-CoV-2 (COVID-19) necessitated global surveillance efforts.
  • Understanding the impact of COVID-19 on other respiratory viruses, like influenza, is crucial for public health planning.

Purpose of the Study:

  • To investigate the impact of COVID-19 on global influenza activity.
  • To compare the prevalence of SARS-CoV-2 and influenza virus cases worldwide.

Main Methods:

  • Utilized global surveillance data collected since 2019.
  • Compared COVID-19 and influenza case numbers across 22 representative countries.
  • Analyzed trends in respiratory virus activity.

Main Results:

  • Demonstrated alternating prevalence patterns between SARS-CoV-2 and influenza viruses.
  • Observed shifts in the dominance of these respiratory viruses over time.
  • Highlighted the dynamic nature of respiratory virus circulation during the pandemic.

Conclusions:

  • COVID-19 significantly impacted the activity patterns of influenza viruses.
  • The findings underscore the importance of continued surveillance for multiple respiratory pathogens.
  • Understanding these alternating dynamics is key for effective respiratory disease management.