Incident cases of asthma worldwide, 2021

37.86 million

new cases per year, worldwide

“Globally, in 2021, the incident cases of asthma reached 37.86 million (95 % UI: 31.38 million to 46.92 million), with an ASIR of 516.70 (95 % UI: 425.36 to 646.13) per 100,000.”

Mao et al., Global, regional, and national burden of asthma from 1990 to 2021: GBD 2021 (Chinese Medical Journal Pulmonary and Critical Care Medicine 2025), results, 2025-03

Kind of source

Peer-reviewed study

Read on

2026-11-06

Daily check

Quote found at the source on 2026-11-06

What to know

GBD 2021 modelled estimate with a wide uncertainty interval. Another GBD 2021 secondary analysis (Hang et al., Public Health 2025) reports 41,555,628 incident cases at the same age-standardised rate, so the count differs between reanalyses.

About

Asthma