Lower Respiratory Tract Infection (LRTI) is an infection affecting the airways and lungs below the voice box, including the bronchi and alveoli. It is most commonly caused by viruses (e.g., influenza, RSV) or bacteria (e.g., *Streptococcus pneumoniae*), but can also be caused by fungi or parasites. LRTI affects individuals of all ages, but is particularly severe in young children, the elderly, and those with weakened immune systems, being a leading cause of global morbidity and mortality. Track Lower Respiratory Tract Infection activity and outbreaks specific to Colorado.
Transmission methods vary.
Contagious Period: Varies by disease
Local health department information and state-specific prevention guidance
Our AI-powered surveillance continuously monitors Lower Respiratory Tract Infection activity across Colorado. We track data from state health departments, local hospitals, CDC reports, and 50+ global health sources to provide early warning of emerging threats.
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For official state health alerts, vaccination locations, and public health guidance specific to Colorado, visit your state health department's website.
Whether you live in Colorado, are traveling there, or have family in the state, understanding Lower Respiratory Tract Infection prevention is essential. Follow these evidence-based prevention measures:
If you experience symptoms of Lower Respiratory Tract Infection in Colorado, contact your healthcare provider immediately. Early diagnosis and treatment improve outcomes significantly.
Emergency symptoms: If you experience severe symptoms, difficulty breathing, or signs of dehydration, call 911 or go to your nearest emergency room.
Trusted information from leading health organizations
Global disease surveillance and guidelines from the World Health Organization
View WHO Resources →Disease information on Virus Watcher is reviewed by our Chief Epidemiologist, a former CDC lead analyst for FluSight forecasting. Outbreak data is aggregated from verified sources including BEACON, ProMED, WHO, CDC, and 50+ national health agencies. This information is for educational purposes and should not replace professional medical advice.
Last reviewed: 2026-03-04
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