Fig. 1: Unadjusted county-level ACP incidence among Medicare enrollees (2016–2019).

The choropleth map shows U.S. counties color-coded based on ACP incidence rate quintile. We suppressed data for six counties with fewer than 120 person-years. Yellow counties: 2003–6600 per 100,000 PY; light orange counties: 6601–7663; dark orange: 7664–8706; bright red: 8707–10,146; dark red: 10,147–23,562; gray: suppressed due to denominator N < 120. ACP All-cause pneumonia, PY person-years.