Upper respiratory infection

An upper respiratory infection is an acute infectious process involving the mucosal surfaces of the upper respiratory tract, including the nasal passages, paranasal sinuses, pharynx, and larynx Predominantly caused by viral pathogens such as rhinoviruses, coronaviruses, and adenoviruses—though occasionally caused by bacterial pathogens—it affects both pediatric and adult populations

An upper respiratory infection is an acute infectious process involving the mucosal surfaces of the upper respiratory tract, including the nasal passages, paranasal sinuses, pharynx, and larynx

Predominantly caused by viral pathogens such as rhinoviruses, coronaviruses, and adenoviruses—though occasionally caused by bacterial pathogens—it affects both pediatric and adult populations Pathophysiologically, pathogen entry and replication trigger local mucosal inflammation, vasodilation, and increased secretions This inflammatory cascade manifests clinically with symptoms such as rhinorrhea, nasal congestion, sneezing, sore throat, cough, malaise, and low-grade fever

Predominantly caused by viral pathogens such as rhinoviruses, coronaviruses, and adenoviruses—though occasionally caused by bacterial pathogens—it affects both pediatric and adult populations This inflammatory cascade manifests clinically with symptoms such as rhinorrhea, nasal congestion, sneezing, sore throat, cough, malaise, and low-grade fever

Pathophysiologically, pathogen entry and replication trigger local mucosal inflammation, vasodilation, and increased secretions