Fig 1.
Waves of influenza A/H1N1 and COVID-19 during initial invasion and subsequent circulation.
Data sources: (A) Olson and colleagues [24]; (B) Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD) [25]; (C) Ritchie and colleagues [6]. Coronavirus Disease 2019, COVID-19; Severe Acute Respiratory Syndrome Coronavirus 2, SARS-CoV-2.
Fig 2.
Changing age distributions of influenza A/H1N1, dengue, and COVID-19 during the transition from pandemic to endemic.
Data sources: (A) Olson and colleagues [24]; (B) Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD) [25]; (C) Karyanti and colleagues [38]; (D) Centers for Disease Control and Prevention [128]. Coronavirus Disease 2019, COVID-19.
Fig 3.
Detection of seasonal coronaviruses in 2 cohort studies, broken down by strain and age group.
Data sources: (A) Nickbakhsh and colleagues [61]; (B) Monto and colleagues [60]. HIVE, Household Influenza Vaccine Evaluation.