Figure 2. Monthly counts of admissions with influenza-specific codes at any diagnosis position in Wales before and during the COVID-19 pandemic. Counts smaller than 5 are suppressed. (A) Stacked bar chart showing the counts of all admissions per influenza polymerase chain reaction status (no test, positive test, or negative test). (B) Bar chart showing the counts of admissions with positive tests only. The dashed vertical line represents the date on which the COVID-19 pandemic was declared. Admission records were extracted from the Patient Episode Database for Wales. Influenza test records were extracted from the Welsh Results Reports Service data source.