Estimated asthma prevalence (%) among patients with coronavirus disease 2019 (COVID-19) in comparison with the general population asthma prevalence in various countries [13–27, 38, 46]
| Country | National asthma prevalence (%) | Asthma prevalence among SARS-CoV-2 positive patients (%) |
| China | ∼1.5–6.5 | ∼1–1.5 |
| USA | ∼8 | ∼10–18 |
| UK | ∼12–18 | ∼14–18 |
| Australia | ∼20 | ∼10–14 |
| Spain | ∼6–7 | ∼5 |
| Italy | ∼6 | ∼1 |
| Ireland | ∼9 | ∼11 |
| Switzerland | ∼5 | ∼6.5 |
| Germany | ∼7–8 | ∼10–11 |
| Israel | ∼7.5–8.5 | ∼5 |
| Mexico | ∼2.5 | ∼2–3 |
| Brazil | ∼12.5–13.0 | ∼5–6 |