Table 1. Clinical and hypoxemic pneumonia definitions.

Pneumonia classification	Definition (signs and symptoms)
Fast breathing pneumonia1	Cough and/or difficulty breathing and
	Fast breathing for age1 and
	No lower chest indrawing and no danger signs2
Chest indrawing pneumonia	Cough and/or difficulty breathing and
	Lower chest indrawing and
	No danger signs2
	May or may not have fast breathing for age1
Danger sign pneumonia	Cough and/or difficulty breathing and
	At least one danger sign2
	May or may not have fast breathing for age1 or lower chest indrawing
Hypoxemic pneumonia	Cough and/or difficulty breathing and
	SpO2<90%
	May or may not have fast breathing for age1 or lower chest indrawing or danger signs2

¹≥60 breaths/minute if <2 months old, ≥50 breaths/minute 2–11 months old; ≥40 breaths/minute if 12–59 months old

²Danger signs are any of the following: central cyanosis (hospital); severe respiratory distress (hospital), stridor in a calm child, inability to drink and/or breastfeed, persistent vomiting, lethargy or unconscious, convulsions), apnea (if 0–2 months of age)

SpO₂ indicates peripheral oxygen saturation.