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Table 1 World Health Organization classification of acute respiratory illness in children presenting with cough and/or difficult breathing

From: Hypoxemia is an independent predictor of bronchiolitis obliterans following respiratory adenoviral infection in children

Classification

Criteria

No pneumonia (cough and cold)

Respiratory rate (breaths/minute)

<50 (infants 2–11 months)

<40 (children 12–59 months)

No lower chest indrawing

Nonsevere pneumonia

Respiratory rate (breaths/minute)

>50 (infants 2–11 months)

<40 (children 12–59 months)

No lower chest indrawing

Severe pneumonia

Lower chest indrawing with or without rapid breathing

Very severe disease

Unable to drink, convulsions, abnormally sleepy or difficult waking, stridor in calm child or clinically severe malnutrition