Global burden of upper respiratory infections in 204 countries and territories, from 1990 to 2019

Background: Upper respiratory infections (URIs) are among the most common diseases. However, the related burden has not been comprehensively evaluated. Thus, we designed the present study to describe the global and regional burden of URIs from 1990 to 2019. Methods: A secondary analysis was performed on the incidence, mortality, and disability-adjusted life years (DALYs) of URIs in different sex and age groups, from 21 geographic regions, 204 countries and territories, between 1990 and 2019, using the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019. Countries and territories were categorized according to Socio-demographic Index (SDI) quintiles. Findings: Globally, the incident cases of URIs reached 17.2 (95% uncertainty interval: 15.4 to 19.3) billion in 2019, which accounted for 42.83% (40.01% to 45.77%) cases from all causes in the GBD 2019 study. The age-standardized incidence rate remained stable from 1990 to 2019, while significant decreases were found in the mortality and DALY rate. The highest age-standardized incidence rates from 1990 to 2019 and the highest age-standardized DALY rates after 2011 were observed in high SDI regions. Among all the age groups, children under five years old suffered from the highest incidence and DALY rates, both of which were decreased with increasing age. Fatal con-sequences of URIs occurred mostly in the elderly and children under five years old. Interpretation: The present study provided comprehensive estimates of URIs burden for the first time. Our find-ings, highlighting the substantial incidence and considerable DALYs due to URIs, are expected to attract more attention to URIs and provide future explorations in the prevention and treatment with epidemiological evidence. Funding: The study was funded by the National Natural Science Foundation of China (81770057). (c) 2021 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Automated summary

This study found a continuous increase in the global incidence of upper respiratory infections. Children under five years old have the highest rates of incidence and DALYs. The age-standardized incidence rate remained stable, while significant decreases were observed in mortality and DALY rates.